CSES - Putka Open 2025 – 2/5

Submission details
Task:	Ryhmät
Sender:	jlaire
Submission time:	2025-09-27 23:47:43 +0300
Language:	C++ (C++17)
Status:	READY
Result:	25

Feedback
group	verdict	score
#1	ACCEPTED	10
#2	ACCEPTED	15
#3	WRONG ANSWER	0

Test results
test	verdict	time	group
#1	ACCEPTED	0.00 s	1, 2, 3	details
#2	ACCEPTED	0.00 s	1, 2, 3	details
#3	ACCEPTED	0.00 s	1, 2, 3	details
#4	ACCEPTED	0.00 s	1, 2, 3	details
#5	ACCEPTED	0.01 s	1, 2, 3	details
#6	ACCEPTED	0.03 s	2	details
#7	ACCEPTED	0.03 s	2	details
#8	ACCEPTED	0.07 s	2	details
#9	ACCEPTED	0.01 s	2, 3	details
#10	ACCEPTED	0.22 s	3	details
#11	ACCEPTED	0.21 s	3	details
#12	ACCEPTED	0.20 s	3	details
#13	ACCEPTED	0.15 s	3	details
#14	WRONG ANSWER	0.17 s	3	details
#15	ACCEPTED	0.29 s	3	details
#16	ACCEPTED	0.25 s	3	details

Code

#include <algorithm>
#include <cassert>
#include <iostream>
#include <map>
#include <utility>
#include <vector>
using namespace std;
using pii = pair<int64_t,int64_t>;

const int64_t N = 1<<17;

struct Data {
    int64_t begin=0, end=0;
};

Data operator+(Data x, Data y) {
    return Data{x.begin+y.begin, x.end+y.end};
}

struct Node {
    Data data;
    Node *L=0, *R=0;
};
Node STORE[40*N];

Node *newNode() {
    static int64_t id=0;
    assert(id < 40*N);
    return &STORE[id++];
}

Data query(Node *tree, int64_t tl, int64_t tr, int64_t ql, int64_t qr) {
    if (!tree || tl > qr || tr < ql) return {};
    if (tl >= ql && tr <= qr) return tree->data;
    int64_t tm = (tl+tr)/2;
    return query(tree->L, tl, tm, ql, qr) +
           query(tree->R, tm+1, tr, ql, qr);
}

Data query(Node *tree, int64_t ql, int64_t qr) {
    return query(tree, 0, N-1, ql, qr);
}

Node *insert(Node *tree, int64_t tl, int64_t tr, int64_t pos, Data data) {
    if (tl > pos || tr < pos) return tree;
    if (tl == tr) {
        Node *node = newNode();
        node->data = data + (tree ? tree->data : Data());
        return node;
    }
    int64_t tm = (tl+tr)/2;
    Node *node = newNode();
    node->L = insert(tree ? tree->L : nullptr, tl, tm, pos, data);
    node->R = insert(tree ? tree->R : nullptr, tm+1, tr, pos, data);
    node->data = (node->L ? node->L->data : Data()) +
                 (node->R ? node->R->data : Data());
    return node;
}

Node *ROOTS[N];

int main() {
    cin.tie(0)->sync_with_stdio(0);
    ROOTS[0] = newNode();
    int n,t; cin>>n>>t;
    vector<pii> ranges(n);
    for (auto& [a,b] : ranges) cin>>a>>b;
    sort(ranges.begin(), ranges.end());
    {
        int maxBegin = 0;
        for (auto [begin,end] : ranges) {
            for (; maxBegin < begin; maxBegin++) {
                ROOTS[maxBegin+1] = ROOTS[maxBegin];
            }
            ROOTS[begin] = insert(ROOTS[begin], 0, N-1, begin, Data{1, 0});
            ROOTS[begin] = insert(ROOTS[begin], 0, N-1, end, Data{0, 1});
        }
    }
    for (int m; cin>>m;) {
        map<int64_t,int64_t> M;
        for (int i=0; i<m; i++) {
            int64_t x; cin>>x;
            M[x] += x;
        }
        bool ok = true;
        int64_t prev_sz = 0;
        int64_t prev_used = 0;
        for (auto [sz,cnt] : M) {
            Data data0 = query(ROOTS[sz], 0, sz-1);
            Data data1 = query(ROOTS[sz], 0, sz);
            int64_t active = data1.begin - data0.end;
            int64_t debt = max<int64_t>(0, prev_used - query(ROOTS[prev_sz], prev_sz, sz-1).end);
            if (active < cnt + debt) {
                ok = false;
                break;
            }
            prev_sz = sz;
            prev_used = cnt + debt;
        }
        cout << (ok ? "YES\n" : "NO\n");
    }
}

Test details

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

input
`100 100 10 10 10 10 6 9 6 8 ...` view save

correct output
`YES YES YES NO YES ...` view save

user output
`YES YES YES NO YES ...` Truncated

Test 2

Group: 1, 2, 3

Verdict: ACCEPTED

input
`100 100 9 9 6 10 8 10 8 8 ...` view save

correct output
`NO YES NO YES NO ...` view save

user output
`NO YES NO YES NO ...` Truncated

Test 3

Group: 1, 2, 3

Verdict: ACCEPTED

input
`100 100 1 1 1 1 1 1 1 1 ...` view save

correct output
`YES YES YES YES YES ...` view save

user output
`YES YES YES YES YES ...` Truncated

Test 4

Group: 1, 2, 3

Verdict: ACCEPTED

input
`100 100 100 100 100 100 100 100 100 100 ...` view save

correct output
`YES YES YES YES YES ...` view save

user output
`YES YES YES YES YES ...` Truncated

Test 5

Group: 1, 2, 3

Verdict: ACCEPTED

input
`100 100 4 9 3 8 7 9 7 9 ...` view save

correct output
`NO NO NO NO NO ...` view save

user output
`NO NO NO NO NO ...` Truncated

Test 6

Group: 2

Verdict: ACCEPTED

input
`1000 1000 9 10 2 5 10 10 5 5 ...` view save

correct output
`YES YES YES YES NO ...` view save

user output
`YES YES YES YES NO ...` Truncated

Test 7

Group: 2

Verdict: ACCEPTED

input
`1000 1000 5 7 9 9 3 7 8 10 ...` view save

correct output
`YES NO NO YES YES ...` view save

user output
`YES NO NO YES YES ...` Truncated

Test 8

Group: 2

Verdict: ACCEPTED

input
`1000 1000 1 1 1 1 1 1 1 1 ...` view save

correct output
`YES YES YES YES YES ...` view save

user output
`YES YES YES YES YES ...` Truncated

Test 9

Group: 2, 3

Verdict: ACCEPTED

input
`1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 ...` view save

correct output
`YES YES YES YES YES ...` view save

user output
`YES YES YES YES YES ...` Truncated

Test 10

Group: 3

Verdict: ACCEPTED

input
`100000 1000 774 778 363 852 309 668 261 459 ...` view save

correct output
`YES YES YES YES YES ...` view save

user output
`YES YES YES YES YES ...` Truncated

Test 11

Group: 3

Verdict: ACCEPTED

input
`100000 1000 1233 1914 901 3963 1277 4293 1083 1599 ...` view save

correct output
`NO NO YES NO NO ...` view save

user output
`NO NO YES NO NO ...` Truncated

Test 12

Group: 3

Verdict: ACCEPTED

input
`100000 1000 1970 8631 4606 5797 6317 8162 8204 8789 ...` view save

correct output
`NO NO NO NO NO ...` view save

user output
`NO NO NO NO NO ...` Truncated

Test 13

Group: 3

Verdict: ACCEPTED

input
`100000 1000 1000 1000 1000 1000 1000 1000 1000 1000 ...` view save

correct output
`YES YES YES YES YES ...` view save

user output
`YES YES YES YES YES ...` Truncated

Test 14

Group: 3

Verdict: WRONG ANSWER

input
`100000 100000 1 100000 1 100000 1 100000 1 100000 ...` view save

correct output
`YES YES YES YES YES ...` view save

user output
`NO NO NO NO NO ...` Truncated

Test 15

Group: 3

Verdict: ACCEPTED

input
`100000 100000 80971 98445 93046 96043 74840 94035 95931 96609 ...` view save

correct output
`NO NO NO NO NO ...` view save

user output
`NO NO NO NO NO ...` Truncated

Test 16

Group: 3

Verdict: ACCEPTED

input
`100000 10000 6481 14350 69129 87600 6217 16462 4387 16625 ...` view save

correct output
`YES YES YES YES YES ...` view save

user output
`YES YES YES YES YES ...` Truncated

Putka Open 2025 – 2/5

Ryhmät

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

Tasks

Submissions (jlaire)