Submission #225201

#	Time	Username	Problem	Language	Result	Execution time	Memory
225201		ngot23	Programiranje (COCI17_programiranje)	C++11	80 / 80	38 ms	7688 KiB

programiranje

#include <bits/stdc++.h>

using namespace std;
const int N=50005;
string s;
int cnt[N][30]; /// cnt[i][j]: so luong ki tu j tu vi tri 1 den vi tri i

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    if(fopen(".inp", "r")) freopen(".inp", "r", stdin);
    cin >> s;
    int n=s.size();
    s=' '+s;
    for(int i=1 ; i<=n ; ++i) {
        for(int j=0 ; j<26 ; ++j) {
            cnt[i][j]=cnt[i-1][j] + (s[i]-'a' == j);
        }
    }
    int T; cin >> T;
    while(T--) {
        int a, b, c, d;
        cin >> a >> b >> c >> d;
        if(b-a != d-c) {
            cout << "NE\n";
            continue;
        }

        bool check=1;
        for(int i=0 ; i<26 ; ++i) {
            if(cnt[b][i]-cnt[a-1][i] != cnt[d][i]-cnt[c-1][i]) {
                check=0;
                break;
            }
        }
        cout << (check ? "DA" : "NE") << '\n';
    }


    return 0;
}

Compilation message (stderr)

programiranje.cpp: In function 'int main()':
programiranje.cpp:10:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     if(fopen(".inp", "r")) freopen(".inp", "r", stdin);
                            ~~~~~~~^~~~~~~~~~~~~~~~~~~~

• Subtask 1: 80 / 80