CSES - Aalto Competitive Programming 2026 - wk8 - Mon

Submission details
Task:	Piva and Glasses
Sender:	aalto26hm_029
Submission time:	2026-10-26 16:57:53 +0200
Language:	C++ (C++20)
Status:	READY
Result:	RUNTIME ERROR

Test results
test	verdict
#1	RUNTIME ERROR	details
#2	RUNTIME ERROR	details
#3	RUNTIME ERROR	details
#4	RUNTIME ERROR	details
#5	RUNTIME ERROR	details
#6	RUNTIME ERROR	details
#7	RUNTIME ERROR	details
#8	RUNTIME ERROR	details
#9	RUNTIME ERROR	details
#10	RUNTIME ERROR	details
#11	RUNTIME ERROR	details
#12	RUNTIME ERROR	details
#13	RUNTIME ERROR	details
#14	RUNTIME ERROR	details
#15	RUNTIME ERROR	details
#16	RUNTIME ERROR	details
#17	RUNTIME ERROR	details
#18	RUNTIME ERROR	details
#19	RUNTIME ERROR	details
#20	RUNTIME ERROR	details
#21	RUNTIME ERROR	details
#22	RUNTIME ERROR	details
#23	RUNTIME ERROR	details
#24	RUNTIME ERROR	details
#25	RUNTIME ERROR	details
#26	RUNTIME ERROR	details
#27	RUNTIME ERROR	details
#28	RUNTIME ERROR	details
#29	RUNTIME ERROR	details
#30	RUNTIME ERROR	details

Compiler report

input/code.cpp: In function 'int main()':
input/code.cpp:53:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |         for (int i = 0; i < path.size(); i++) {
      |                         ~~^~~~~~~~~~~~~
input/code.cpp:54:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |             for (int j = 0; j < adj[path[i]].size(); j++) {
      |                             ~~^~~~~~~~~~~~~~~~~~~~~
input/code.cpp:55:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |                 if (i < path.size()-1 && adj[path[i]][j] == path[i+1]) {
      |                     ~~^~~~~~~~~~~~~~~
input/code.cpp:67:27: warning: comparison of integer expressions of different si...

Code

#include <bits/stdc++.h>
using namespace std;

vector<int> bfs(vector<vector<int>> adj, int n) {
    vector<int> visited(n+1, -1);
    queue<int> q;
    visited[1] = true;
    q.push(1);
    bool found = false;
    while(!q.empty()) {
        int currNode = q.front();
        q.pop();
        if (currNode == n) {
            found = true;
            break;
        }
        for (auto nextNode : adj[currNode]) {
            if (visited[nextNode] == -1) {
                visited[nextNode] = currNode;
                q.push(nextNode);
            }
        }
    }
    if (!found) return {};
    vector<int> path;
    int curr = n;
    while (curr != 1) {
        path.push_back(curr);
        curr = visited[curr];
    }
    path.push_back(1);
    reverse(path.begin(), path.end());
    return path;
}

int main() {
    std::ios_base::sync_with_stdio(0);
    int n, m;
    cin >> n >> m;
    vector<vector<int>> adj(n+1);
    for (int i = 0; i < m; i++) {
        int t1, t2;
        cin >> t1 >> t2;
        adj[t1+1].push_back(t2+1);
        adj[t2+1].push_back(t1+1);
    }
    int day = 0;
    vector<vector<int>> ans;
    while (true) {
        vector<int> path = bfs(adj, n);
        if (path.empty()) break;
        ans[day++] = path;
        for (int i = 0; i < path.size(); i++) {
            for (int j = 0; j < adj[path[i]].size(); j++) {
                if (i < path.size()-1 && adj[path[i]][j] == path[i+1]) {
                    adj[path[i]].erase(adj[path[i]].begin() + j);
                }
                if (i > 0 && adj[path[i]][j] == path[i-1]) {
                    adj[path[i]].erase(adj[path[i]].begin() + j);
                }
            }
        }
    }
    cout << day;
    for (int i = 0; i < day; i++) {
        cout << ans[i].size() << '\n';
        for (int j = 0; j < ans[i].size(); j++) {
            cout << ans[i][j] << ' ';
        }
        cout << '\n';
    }
}

Test details

Test 1

Verdict: RUNTIME ERROR

input
`mynbiqpmzjplsgqejeydtzirwztejd...` view save

correct output
`253955382019371746305129921157...` view save

user output
(empty)

Test 2

Verdict: RUNTIME ERROR

input
`szycidpyopumzgdpamntyyawoixzhs...` view save

correct output
`551108061158008078173415475169...` view save

user output
(empty)

Test 3

Verdict: RUNTIME ERROR

input
`bcclfxzvjitgtbsvfnumzxqlroqiba...` view save

correct output
`305421613370742845795015587427...` view save

user output
(empty)

Test 4

Verdict: RUNTIME ERROR

input
`sreltpusctapirhgwprrpmuehueqmx...` view save

correct output
`140037512077395979638061040922...` view save

user output
(empty)

Test 5

Verdict: RUNTIME ERROR

input
`jdxmpeccamrjzybhqrliyfdigauziz...` view save

correct output
`348940989405062643281218932084...` view save

user output
(empty)

Test 6

Verdict: RUNTIME ERROR

input
`ixlzwxuqaoyhubfdlphmrdshaxgnif...` view save

correct output
`523444502687933447128799316928...` view save

user output
(empty)

Test 7

Verdict: RUNTIME ERROR

input
`scpyibaevspyxlkyaipzgxnrrvdgsr...` view save

correct output
`804291277421765770488004812470...` view save

user output
(empty)

Test 8

Verdict: RUNTIME ERROR

input
`emubcrdlsbqgbcnnchcrnbsdhuusbs...` view save

correct output
`539368193886087805857792545271...` view save

user output
(empty)

Test 9

Verdict: RUNTIME ERROR

input
`lmegwbcehzqgmuaopompsgmcphyawi...` view save

correct output
`665407925762077489110285862326...` view save

user output
(empty)

Test 10

Verdict: RUNTIME ERROR

input
`tliefvakqotckrtwbxmfwoxnffhbde...` view save

correct output
`129648761524634643411433104526...` view save

user output
(empty)

Test 11

Verdict: RUNTIME ERROR

input
`bnpsagopiuzfbqpkchxlbnetlmnjvi...` view save

correct output
`254352633815523810681607015996...` view save

user output
(empty)

Test 12

Verdict: RUNTIME ERROR

input
`ryooqsgfzqputzfdojecrzwubtmoux...` view save

correct output
`212452622895141284453529611450...` view save

user output
(empty)

Test 13

Verdict: RUNTIME ERROR

input
`ivqvlemalpiuzowthravteolfkgbsg...` view save

correct output
`732490220763260338635928880269...` view save

user output
(empty)

Test 14

Verdict: RUNTIME ERROR

input
`jvvzfuhvehuxfecrgxjanevtaieczz...` view save

correct output
`518420681110543932377602451247...` view save

user output
(empty)

Test 15

Verdict: RUNTIME ERROR

input
`twyuqhixijxcvojovmmydihklzilzu...` view save

correct output
`364802587715444496585869643172...` view save

user output
(empty)

Test 16

Verdict: RUNTIME ERROR

input
`gaqxbfhabzvewlhdkowlimilhglzkh...` view save

correct output
`476873862461844332247115208362...` view save

user output
(empty)

Test 17

Verdict: RUNTIME ERROR

input
`ppjnhoanvwihuhajjkvextjazhtiae...` view save

correct output
`767343312313426142222306561536...` view save

user output
(empty)

Test 18

Verdict: RUNTIME ERROR

input
`nzjljfywwrvidahmxniqzkuvxmerbe...` view save

correct output
`910297874112935296564114827261...` view save

user output
(empty)

Test 19

Verdict: RUNTIME ERROR

input
`dvokhgpupfpjoigiwdkqvyzfzhfhgx...` view save

correct output
`188739064612275094017617681593...` view save

user output
(empty)

Test 20

Verdict: RUNTIME ERROR

input
`bzqdqgmlqjsetidinkidykjastgcgd...` view save

correct output
`232461691179008854504057599827...` view save

user output
(empty)

Test 21

Verdict: RUNTIME ERROR

input
`xvzyeivudksfanncdekpsonggkuvkk...` view save

correct output
`285713951274252866113989732127...` view save

user output
(empty)

Test 22

Verdict: RUNTIME ERROR

input
`nwnujpgzpzqfqqhzaalsncezyhhwbn...` view save

correct output
`731682739693843565903082665678...` view save

user output
(empty)

Test 23

Verdict: RUNTIME ERROR

input
`ehatofwdxulzchibktfrvxnwbsasij...` view save

correct output
`450074573205377125973875496260...` view save

user output
(empty)

Test 24

Verdict: RUNTIME ERROR

input
`yjcasjnmqlexgioahtoadcwpnaquxn...` view save

correct output
`596345160784615487534168536470...` view save

user output
(empty)

Test 25

Verdict: RUNTIME ERROR

input
`msfgfgfvvcwyezwjxyaooxudaqfpxo...` view save

correct output
`717476109909956801533326919144...` view save

user output
(empty)

Test 26

Verdict: RUNTIME ERROR

input
`yagjupbyibjsndsdsvxgqztkfrlqpq...` view save

correct output
`235583496947932628535470171742...` view save

user output
(empty)

Test 27

Verdict: RUNTIME ERROR

input
`gvgntrbeyypbxvtqfunhxnwgzwavhe...` view save

correct output
`111088422779874450993038450753...` view save

user output
(empty)

Test 28

Verdict: RUNTIME ERROR

input
`pwijgccirkilmfhhpcxusuctnynxbv...` view save

correct output
`446346258489784916012992902633...` view save

user output
(empty)

Test 29

Verdict: RUNTIME ERROR

input
`xertwfheuoynggemfetgganhcdnkwe...` view save

correct output
`283497304854230709850344401214...` view save

user output
(empty)

Test 30

Verdict: RUNTIME ERROR

input
`clttjcqlmnabdouhzlcpktrnxgofhn...` view save

correct output
`218953374961690394340463245163...` view save

user output
(empty)

Aalto Competitive Programming 2026 - wk8 - Mon

Piva and Glasses

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

Test 26

Test 27

Test 28

Test 29

Test 30

Tasks

Submissions (aalto26hm_029)