CSES - Datatähti 2025 alku

CSES - Datatähti 2025 alku - Results

Submission details
Task:	Niitty
Sender:	Pikaksi
Submission time:	2024-11-03 12:10:17 +0200
Language:	C++ (C++20)
Status:	READY
Result:	0

Feedback
group	verdict	score
#1	TIME LIMIT EXCEEDED	0
#2	TIME LIMIT EXCEEDED	0
#3	TIME LIMIT EXCEEDED	0
#4	TIME LIMIT EXCEEDED	0
#5	TIME LIMIT EXCEEDED	0
#6	TIME LIMIT EXCEEDED	0

Test results
test	verdict	time	group
#1	TIME LIMIT EXCEEDED	--	1, 2, 3, 4, 5, 6	details
#2	ACCEPTED	0.00 s	1, 2, 3, 4, 5, 6	details
#3	TIME LIMIT EXCEEDED	--	1, 2, 3, 4, 5, 6	details
#4	ACCEPTED	0.00 s	1, 2, 3, 4, 5, 6	details
#5	ACCEPTED	0.00 s	1, 2, 3, 4, 5, 6	details
#6	TIME LIMIT EXCEEDED	--	2, 3, 4, 5, 6	details
#7	TIME LIMIT EXCEEDED	--	2, 3, 4, 5, 6	details
#8	TIME LIMIT EXCEEDED	--	2, 3, 4, 5, 6	details
#9	ACCEPTED	0.00 s	2, 3, 4, 5, 6	details
#10	TIME LIMIT EXCEEDED	--	3, 4, 5, 6	details
#11	TIME LIMIT EXCEEDED	--	3, 4, 5, 6	details
#12	TIME LIMIT EXCEEDED	--	3, 4, 5, 6	details
#13	ACCEPTED	0.00 s	3, 4, 5, 6	details
#14	TIME LIMIT EXCEEDED	--	4, 5, 6	details
#15	TIME LIMIT EXCEEDED	--	4, 5, 6	details
#16	TIME LIMIT EXCEEDED	--	4, 5, 6	details
#17	ACCEPTED	0.00 s	4, 5, 6	details
#18	TIME LIMIT EXCEEDED	--	5, 6	details
#19	TIME LIMIT EXCEEDED	--	5, 6	details
#20	TIME LIMIT EXCEEDED	--	5, 6	details
#21	TIME LIMIT EXCEEDED	--	5, 6	details
#22	TIME LIMIT EXCEEDED	--	6	details
#23	TIME LIMIT EXCEEDED	--	6	details
#24	TIME LIMIT EXCEEDED	--	6	details
#25	TIME LIMIT EXCEEDED	--	6	details

Compiler report

input/code.cpp: In function 'bool closeLeftEdge(Fence, std::array<int, 26>&)':
input/code.cpp:33:51: warning: array subscript has type 'char' [-Wchar-subscripts]
   33 |         removedFlowers[field[fence.y + k][fence.x]] += 1;
      |                                                   ^
input/code.cpp: In function 'bool closeRightEdge(Fence, std::array<int, 26>&)':
input/code.cpp:55:69: warning: array subscript has type 'char' [-Wchar-subscripts]
   55 |         removedFlowers[field[fence.y + k][fence.x + fence.sizeX - 1]] += 1;
      |                                                                     ^
input/code.cpp: In function 'bool closeTopEdge(Fence, std::array<int, 26>&)':
input/code.cpp:76:51: warning: array subscript has type 'char' [-Wchar-subscripts]
   76 |         removedFlowers[field[fence.y][fence.x + k]] += 1;
      |                                                   ^
input/code.cpp: In function 'bool closeBottomEdge(Fence, std::array<int, 26>&)':
input/code.cpp:100:...

Code

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

union Fence
{
    struct {
        uint16_t x;
        uint16_t y;
        uint16_t sizeX;
        uint16_t sizeY;
    };
    ll bytes;
};

bool containedNumbers[26] = {0};
vector<vector<char>> field;
unordered_set<ll> elementaryFences;
vector<Fence> eFencesFinal;
int n = 0;

void printFence(Fence fence)
{
    cout << fence.x << " " << fence.y << " " << fence.sizeX << " " << fence.sizeY << "\n";
}

bool closeLeftEdge(Fence fence, array<int, 26>& flowerCount)
{
    int removedFlowers[26] = {0};

    for (int k = 0; k < fence.sizeY; k++) {
        removedFlowers[field[fence.y + k][fence.x]] += 1;
    }
    
    for (int k = 0; k < 26; k++) {
        if (containedNumbers[k] && flowerCount[k] - removedFlowers[k] <= 0) {
            return false;
        }
    }
        
    for (int i = 0; i < 26; i++) {
        if (containedNumbers[i]) {
            flowerCount[i] -= removedFlowers[i];
        }
    }
    return true;
}

bool closeRightEdge(Fence fence, array<int, 26>& flowerCount)
{
    int removedFlowers[26] = {0};

    for (int k = 0; k < fence.sizeY; k++) {
        removedFlowers[field[fence.y + k][fence.x + fence.sizeX - 1]] += 1;
    }
    
    for (int k = 0; k < 26; k++) {
        if (containedNumbers[k] && flowerCount[k] - removedFlowers[k] <= 0) {
            return false;
        }
    }

    for (int i = 0; i < 26; i++) {
        if (containedNumbers[i]) {
            flowerCount[i] -= removedFlowers[i];
        }
    }
    return true;
}
bool closeTopEdge(Fence fence, array<int, 26>& flowerCount)
{
    int removedFlowers[26] = {0};

    for (int k = 0; k < fence.sizeX; k++) {
        removedFlowers[field[fence.y][fence.x + k]] += 1;
    }
    
    for (int k = 0; k < 26; k++) {
        if (containedNumbers[k] && flowerCount[k] - removedFlowers[k] <= 0) {
            return false;
        }
    }
    
    for (int i = 0; i < 26; i++) {
        if (containedNumbers[i]) {
            flowerCount[i] -= removedFlowers[i];
        }
    }
    return true;
}

bool closeBottomEdge(Fence fence, array<int, 26>& flowerCount)
{
    int removedFlowers[26] = {0};
    
    int y = fence.y + fence.sizeY - 1;
    
    for (int k = 0; k < fence.sizeX; k++) {
        removedFlowers[field[y][fence.x + k]] += 1;
    }
    
    for (int k = 0; k < 26; k++) {
        if (containedNumbers[k] && flowerCount[k] - removedFlowers[k] <= 0) {
            return false;
        }
    }
    
    for (int i = 0; i < 26; i++) {
        if (containedNumbers[i]) {
            flowerCount[i] -= removedFlowers[i];
        }
    }
    return true;
}

Fence findElementaryFence(Fence fence, array<int, 26>& flowerCount)
{
    //printFence(fence);
    while (closeLeftEdge(fence, flowerCount)) {
        fence.x += 1;
        fence.sizeX -= 1;
    }
    //printFence(fence);

    while (closeRightEdge(fence, flowerCount)) {
        fence.sizeX -= 1;
    }
    //printFence(fence);

    while (closeTopEdge(fence, flowerCount)) {
        fence.y += 1;
        fence.sizeY -= 1;
    }
    //printFence(fence);

    while (closeBottomEdge(fence, flowerCount)) {
        fence.sizeY -= 1;
    }
    //printFence(fence);

    return fence;
}

array<int, 26> getFlowerCount(Fence fence)
{
    //printFence(fence);
    array<int, 26> flowerCount = {0};

    for (int y = 0; y < fence.sizeY; y++) {
        for (int x = 0; x < fence.sizeX; x++) {
            flowerCount[field[fence.y + y][fence.x + x]] += 1;
        }
    }
    return flowerCount;
}

void splitFence(Fence fence, Fence elementaryFence, vector<Fence>& outFence)
{
    uint16_t r = elementaryFence.x + elementaryFence.sizeX - 1;
    uint16_t l = elementaryFence.x;
    uint16_t d = elementaryFence.y + elementaryFence.sizeY - 1;
    uint16_t u = elementaryFence.y;

    if (fence.x != r) {
        Fence fenceAdd = {fence.x, fence.y, r - fence.x, fence.sizeY};
        outFence.push_back(fenceAdd);
    }
    if (fence.y != d) {
        Fence fenceAdd = {fence.x, fence.y, fence.sizeX, d - fence.y};
        outFence.push_back(fenceAdd);
    }
    if (fence.x + fence.sizeX - 1 != l) {
        Fence fenceAdd = {elementaryFence.x + 1, fence.y, fence.x + fence.sizeX - l - 1, fence.sizeY};
        outFence.push_back(fenceAdd);
    }
    if (fence.y + fence.sizeY - 1 != u) {
        Fence fenceAdd = {fence.x, elementaryFence.y + 1, fence.sizeX, fence.y + fence.sizeY - u - 1};
        outFence.push_back(fenceAdd);
    }

    /*cout << "splittin fence = ";
    printFence(fence);
    cout << "with elementaryFence = ";
    printFence(elementaryFence);
    for (Fence fence : outFence) {
        cout << "  ";
        printFence(fence);
    }
    cout << "\n";*/
}

void recursiveSplit(Fence fence, array<int, 26>& flowerCount)
{
    Fence eFence = findElementaryFence(fence, flowerCount);
    elementaryFences.insert(eFence.bytes);

    vector<Fence> splitFences;
    splitFence(fence, eFence, splitFences);

    //cout << "eFence = ";
    //printFence(eFence);
    //cout << "split fences = " << splitFences.size() << "\n";

    for (int i = 0; i < splitFences.size(); i++) {
        array<int, 26> splitFlowerCount = getFlowerCount(splitFences[i]);

        bool isValid = true;
        for (int k = 0; k < 26; k++) {
            if (containedNumbers[k] && splitFlowerCount[k] <= 0) {
                isValid = false;
                break;
            }
        }
        if (isValid) {
            recursiveSplit(splitFences[i], splitFlowerCount);
        }
    }   
}

ll eFenceArea(vector<Fence>& eFences)
{
    uint16_t u = 600, d = 0, l = 600, r = 0;

    for (int i = 0; i < eFences.size(); i++) {
        Fence fence = eFences[i];
        u = min(u, fence.y);
        d = max(d, (uint16_t)(fence.y + fence.sizeY - (uint16_t)1));
        l = min(l, fence.x);
        r = max(r, (uint16_t)(fence.x + fence.sizeX - (uint16_t)1));
    }
    ll area = l + 1LL;
    area *= n - r;
    area *= u + 1LL;
    area *= n - d;
    return area;
}

ll areaRecursive(int calls, int startIndex, vector<Fence>& fences)
{
    ll area = 0;
    if (calls == 0) {
        area += eFenceArea(fences);
    }

    for (int i = startIndex; i < eFencesFinal.size(); i++) {
        //cout << "recursiveLoop\n";
        fences.push_back(eFencesFinal[i]);
        area += areaRecursive(calls - 1, i + 1, fences);
        fences.pop_back();
    }

    return area;
}

void calculateCombinations()
{
    for (ll fenceBytes : elementaryFences) {
        Fence fence;
        fence.bytes = fenceBytes;
        eFencesFinal.push_back(fence);
    }

    ll area = 0;
    for (int i = 0; i < eFencesFinal.size(); i++) {
        //cout << "startLoop\n";
        vector<Fence> fences;
        ll areaLoop = areaRecursive(i + 1, 0, fences);
        if (i & 1) {
            area -= areaLoop;
        }
        else {
            area += areaLoop;
        }
    }
    cout << area;
}

int main()
{
    //vector<string> testField = {"AAAAA", "AAAAA", "AABAA", "AAACA", "AAADA"};
    //vector<string> testField = {"BAA", "AAB", "AAA"};
    //vector<string> testField = {"AAAK", "ABAA", "ABAA", "AAAA"};
    //n = testField.size();
    cin >> n;

    field = vector<vector<char>>(n, vector<char>(n));

    for (int i = 0; i < n; i++) {
        string row = "";
        cin >> row;
        //string row = testField[i];

        for (int k = 0; k < n; k++) {
            char value = row[k] - 'A';
            field[i][k] = value;
            containedNumbers[value] = true;
        }
    }

    array<int, 26> flowerCount = {0};
    for (vector<char> fieldRow : field) {
        for (char character : fieldRow) {
            flowerCount[character]++;
            //cout << (int)character;
        }
        //cout << "\n";
    }

    /*for (int i = 0; i < 26; i++) {
        cout << (int)containedNumbers[i];
    }*/

    Fence startFence = {0, 0, (uint16_t)n, (uint16_t)n};
    recursiveSplit(startFence, flowerCount);

    /*cout << "efences:\n";
    for (ll fenceBytes : elementaryFences) {
        Fence eFence;
        eFence.bytes = fenceBytes;
        printFence(eFence);
    }*/

    calculateCombinations();
}

Test details

Test 1

Group: 1, 2, 3, 4, 5, 6

Verdict: TIME LIMIT EXCEEDED

input
`10 TNCTNPNTPC NPPNTNTPTP NTNTTCNTCT NPCPNPPNTT ...` view save

correct output
`2035` view save

user output
(empty)

Test 2

Group: 1, 2, 3, 4, 5, 6

Verdict: ACCEPTED

input
`10 NFWQLWNWYS DZOQJVXFPJ CNHXPXMCQD QRTBVNLTQC ...` view save

correct output
`9` view save

user output
`9` view save

Test 3

Group: 1, 2, 3, 4, 5, 6

Verdict: TIME LIMIT EXCEEDED

input
`10 XXXXXXXXXX XXXXXXXXXX XXXXXXXXXX XXXXXXXXXX ...` view save

correct output
`3025` view save

user output
(empty)

Test 4

Group: 1, 2, 3, 4, 5, 6

Verdict: ACCEPTED

input
`10 FFFFFFFFFF FFFFFCFFFF FFFFFFJFFF FFFFFFFFFF ...` view save

correct output
`12` view save

user output
`12` view save

Test 5

Group: 1, 2, 3, 4, 5, 6

Verdict: ACCEPTED

input
`1 X` view save

correct output
`1` view save

user output
`1` view save

Test 6

Group: 2, 3, 4, 5, 6

Verdict: TIME LIMIT EXCEEDED

input
`20 BBCBUBOUOBBCUUBBCOUO BOUCOOCUBCOOOCOBOCUO UCCUUUOBCOCBCBUBUCOO BUOBUCUCUOOBCOOUBUOO ...` view save

correct output
`38724` view save

user output
(empty)

Test 7

Group: 2, 3, 4, 5, 6

Verdict: TIME LIMIT EXCEEDED

input
`20 CBGLSHGZHYZDWBNDBJUG SMUXOJQYPXZDTMJUIWOJ XIDSTNBGHKRKOVUVMINB MTQGCFRUHQKALXRNCQGS ...` view save

correct output
`8334` view save

user output
(empty)

Test 8

Group: 2, 3, 4, 5, 6

Verdict: TIME LIMIT EXCEEDED

input
`20 KKKKKKKKKKKKKKKKKKKK KKKKKKKKKKKKKKKKKKKK KKKKKKKKKKKKKKKKKKKK KKKKKKKKKKKKKKKKKKKK ...` view save

correct output
`44100` view save

user output
(empty)

Test 9

Group: 2, 3, 4, 5, 6

Verdict: ACCEPTED

input
`20 AAAAAAAAXAAAAAAAAAAA AAAWAAAAAAAAAAAAAOAA AAAAAAAAAAAAAAAAAPAA AAAAAAAAKAAAAAAAAAAZ ...` view save

correct output
`18` view save

user output
`18` view save

Test 10

Group: 3, 4, 5, 6

Verdict: TIME LIMIT EXCEEDED

input
`50 GRGREEEGREGXRXXEGXXREXGRRRGRRR...` view save

correct output
`1584665` view save

user output
(empty)

Test 11

Group: 3, 4, 5, 6

Verdict: TIME LIMIT EXCEEDED

input
`50 AITIISJUHCCRZNKSDCNQKYSQRINFWJ...` view save

correct output
`1077746` view save

user output
(empty)

Test 12

Group: 3, 4, 5, 6

Verdict: TIME LIMIT EXCEEDED

input
`50 OOOOOOOOOOOOOOOOOOOOOOOOOOOOOO...` view save

correct output
`1625625` view save

user output
(empty)

Test 13

Group: 3, 4, 5, 6

Verdict: ACCEPTED

input
`50 FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF...` view save

correct output
`1680` view save

user output
`1680` view save

Test 14

Group: 4, 5, 6

Verdict: TIME LIMIT EXCEEDED

input
`100 NNCMDCDDCCNNNDNCMMNCDCDCCDCDNM...` view save

correct output
`25325366` view save

user output
(empty)

Test 15

Group: 4, 5, 6

Verdict: TIME LIMIT EXCEEDED

input
`100 LIMQQIHASECROEVILNVULGWZJPPKOG...` view save

correct output
`22342463` view save

user output
(empty)

Test 16

Group: 4, 5, 6

Verdict: TIME LIMIT EXCEEDED

input
`100 TTTTTTTTTTTTTTTTTTTTTTTTTTTTTT...` view save

correct output
`25502500` view save

user output
(empty)

Test 17

Group: 4, 5, 6

Verdict: ACCEPTED

input
`100 QXQQQQQQQQQQQQQQQQQQQQQQQQQQQQ...` view save

correct output
`25650` view save

user output
`25650` view save

Test 18

Group: 5, 6

Verdict: TIME LIMIT EXCEEDED

input
`200 NAANANMMKNKKAKMKMAKNKMNKMMNNAA...` view save

correct output
`403292767` view save

user output
(empty)

Test 19

Group: 5, 6

Verdict: TIME LIMIT EXCEEDED

input
`200 OMYWATTLURKQPTKEFMGGYAOONXWVSC...` view save

correct output
`388111321` view save

user output
(empty)

Test 20

Group: 5, 6

Verdict: TIME LIMIT EXCEEDED

input
`200 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCC...` view save

correct output
`404010000` view save

user output
(empty)

Test 21

Group: 5, 6

Verdict: TIME LIMIT EXCEEDED

input
`200 LLLLLLLLLLLLLLLLLHLLLLLLLLLLLL...` view save

correct output
`14159445` view save

user output
(empty)

Test 22

Group: 6

Verdict: TIME LIMIT EXCEEDED

input
`500 VVHWVUHVHUWWWVUUUWVUUHUUWHWUVW...` view save

correct output
`15683003812` view save

user output
(empty)

Test 23

Group: 6

Verdict: TIME LIMIT EXCEEDED

input
`500 OIMZGEQSBMBDSDXSWRFNKSGFEBBTJE...` view save

correct output
`15575906951` view save

user output
(empty)

Test 24

Group: 6

Verdict: TIME LIMIT EXCEEDED

input
`500 IIIIIIIIIIIIIIIIIIIIIIIIIIIIII...` view save

correct output
`15687562500` view save

user output
(empty)

Test 25

Group: 6

Verdict: TIME LIMIT EXCEEDED

input
`500 WWWWWWWWWWWWWWWWWWWWWWWWWWWWWW...` view save

correct output
`3058970930` view save

user output
(empty)

Datatähti 2025 alku

Niitty

Compiler report

Code

Test details

Test 1

Test 2

Test 3

Test 4

Test 5

Test 6

Test 7

Test 8

Test 9

Test 10

Test 11

Test 12

Test 13

Test 14

Test 15

Test 16

Test 17

Test 18

Test 19

Test 20

Test 21

Test 22

Test 23

Test 24

Test 25

Tasks

Submissions (Pikaksi)