CSES - Putka Open 2025 – 2/5

Submission details
Task:	Ryhmät
Sender:	Yytsi
Submission time:	2025-09-27 20:23:57 +0300
Language:	C++ (C++20)
Status:	READY
Result:	0

Feedback
group	verdict	score
#1	WRONG ANSWER	0
#2	WRONG ANSWER	0
#3	WRONG ANSWER	0

Test results
test	verdict	time	group
#1	WRONG ANSWER	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	0.01 s	2	details
#7	ACCEPTED	0.03 s	2	details
#8	ACCEPTED	0.08 s	2	details
#9	ACCEPTED	0.00 s	2, 3	details
#10	ACCEPTED	0.03 s	3	details
#11	WRONG ANSWER	0.03 s	3	details
#12	WRONG ANSWER	0.03 s	3	details
#13	ACCEPTED	0.03 s	3	details
#14	ACCEPTED	0.05 s	3	details
#15	ACCEPTED	0.05 s	3	details
#16	ACCEPTED	0.04 s	3	details

Compiler report

input/code.cpp: In function 'void solve()':
input/code.cpp:43:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |   for (int i = 0; i < blockSizes.size(); i++) {
      |                   ~~^~~~~~~~~~~~~~~~~~~

Code

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

#ifdef LOCAL
#include "debug.hpp"
#else
#define debug(...) 0xffff
#endif

#define N 101010

int countOfL[N], countOfR[N], prefL[N], prefR[N];
int n;

void solve() {
  int m; cin>>m;
  vector<int> groupSizeDemands(m);
  for (int i = 0; i < m; i++) cin>>groupSizeDemands[i];
  sort(groupSizeDemands.begin(), groupSizeDemands.end());

  ll reqSum = 0, deficientKids = 0;

  vector<pair<ll, ll>> blockSizes;
  pair<ll, ll> curBlock = {groupSizeDemands[0], 1}; // sum, cnt

  for (int i = 1; i < m; i++) {
    ll demand = groupSizeDemands[i];
    if (demand != curBlock.first) {
      // add block
      blockSizes.push_back(curBlock);
      curBlock = {demand, 1};
      continue;
    }
    // same demand so stack this
    curBlock.second++;
  }

  // for (auto bl : blockSizes) cout<<bl.first<<" "<<bl.second<<"\n";

  if (curBlock.second != 0) blockSizes.push_back(curBlock);

  for (int i = 0; i < blockSizes.size(); i++) {
    ll needSum = blockSizes[i].first;
    ll blockCnt = blockSizes[i].second;
    // considering only up to before this block (needSum - 1)!
    deficientKids = min(deficientKids, reqSum - prefR[needSum - 1]);
    reqSum += blockCnt * needSum;

    // cout<<needSum<<" "<<deficientKids<<" "<<reqSum<<"\n";

    // if (reqSum > prefL[needSum]) return void(cout << "NO\n");
    if (reqSum - prefL[needSum] > deficientKids) return void(cout << "NO\n");
  }

  cout << "YES\n";
}

int main() {
  ios_base::sync_with_stdio(0); cin.tie(0);

  int t;
  cin>>n>>t;

  for (int i = 0; i < n; i++) {
    int a, b; cin>>a>>b;
    countOfL[a]++;
    countOfR[b]++;
  }

  prefL[0] = prefR[0] = 0; // can't be this...

  for (int i = 1; i <= n; i++) {
    prefL[i] = prefL[i-1] + countOfL[i];
    prefR[i] = prefR[i-1] + countOfR[i];
  }

  while (t--) {
    solve();
  }
}

Test details

Test 1

Group: 1, 2, 3

Verdict: WRONG ANSWER

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 ...` view save

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 ...` view save

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 ...` view save

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 ...` view save

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 ...` view save

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 ...` view save

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 ...` view save

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 ...` view save

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 ...` view save

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 ...` view save

Test 11

Group: 3

Verdict: WRONG ANSWER

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 ...` view save

Test 12

Group: 3

Verdict: WRONG ANSWER

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 ...` view save

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 ...` view save

Test 14

Group: 3

Verdict: ACCEPTED

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

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

user output
`YES YES YES YES YES ...` view save

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 ...` view save

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 ...` view save

Putka Open 2025 – 2/5

Ryhmät

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

Tasks

Submissions (Yytsi)