Submission #680959

#	Time	Username	Problem	Language	Result	Execution time	Memory
680959		Cross_Ratio	Ice Hockey World Championship (CEOI15_bobek)	C++14	40 / 100	108 ms	17400 KiB

bobek

#include <bits/stdc++.h>
#define int long long
using namespace std;
int A[45];
vector<int> B, C;
signed main() {
    cin.sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int N, M;
    cin >> N >> M;
    int i, j;
    for(i=0;i<N;i++) cin >> A[i];
    B.push_back(0);
    for(i=0;i<min(20LL, N);i++) {
        int sz = B.size();
        for(j=0;j<sz;j++) B.push_back(B[j] + A[i]);
    }
    C.push_back(0);
    for(i=20;i<N;i++) {
        int sz = C.size();
        for(j=0;j<sz;j++) C.push_back(C[j] + A[j]);
    }
    sort(B.begin(),B.end());
    sort(C.begin(),C.end());
    j = (int)B.size() - 1;
    int ans = 0;
    for(i=0;i<C.size();i++) {
        while(j>=0&&B[j]+C[i]>M) j--;
        ans += j+1;
    }
    cout << ans;
}

Compilation message (stderr)

bobek.cpp: In function 'int main()':
bobek.cpp:28:14: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |     for(i=0;i<C.size();i++) {
      |             ~^~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10