Submission #164237

#	Time	Username	Problem	Language	Result	Execution time	Memory
164237		aggu_01000101	Ispit (COCI19_ispit)	C++14	90 / 90	805 ms	6396 KiB

Main

#include <iostream>

#include <cmath>
#include <vector>
#include <algorithm>
#include <queue>
#include <fstream>
#include <set>
#include <iomanip>
#include <unordered_map>
#define INF 1e16
#define int long long
#define N (int)1e5 + 5
using namespace std;
int32_t main(){
    ios_base::sync_with_stdio(false);
    cout.tie(0); cin.tie(0);
    int n, m;
    cin>>n>>m;
    int mat[n][n];
    int maxpref[n][n];
    int maxsuff[n][n];
    for(int i = 0;i<n;i++){
        string s;
        cin>>s;
        for(int j =0 ;j<s.length();j++){
            mat[i][j] = s[j]-'a';
        }
    }
    for(int i = 0;i<n;i++){
        for(int j = i+1;j<n;j++){
            maxpref[i][j] = maxsuff[i][j] = 0;
            int k = -1;
            while(++k<n && mat[i][k]==mat[j][k]) ++maxpref[i][j];
            k = n;
            while(--k>=0 && mat[i][k]==mat[j][k]) ++maxsuff[i][j];
        }
    }
    int cnt[26], cnt1[26];
    bool possible = false;
    for(int i = 0;i<n;i++){
        for(int k = i+1;k<n;k++){
            for(int i = 0;i<26;i++) cnt[i] = cnt1[i] = 0;
            int samecount = 26;
            for(int j = 0;j<m;j++){
                if(mat[i][j] != mat[k][j] && cnt[mat[i][j]] == cnt1[mat[i][j]]) samecount--;
                cnt[mat[i][j]]++;
                if(mat[i][j] != mat[k][j] && cnt[mat[k][j]] == cnt1[mat[k][j]]) samecount--;
                cnt1[mat[k][j]]++;
                if(mat[i][j] != mat[k][j] && cnt[mat[i][j]] == cnt1[mat[i][j]]) samecount++;
                if(mat[i][j] != mat[k][j] && cnt[mat[k][j]] == cnt1[mat[k][j]]) samecount++;
            }
            if(samecount==26 && maxsuff[i][k]>=(n-m)) possible = true;
            for(int j = m;j<n;j++){
                if(mat[i][j-m] != mat[k][j-m] && cnt[mat[i][j-m]] == cnt1[mat[i][j-m]]) samecount--;
                cnt[mat[i][j-m]]--;
                if(mat[i][j-m] != mat[k][j-m] && cnt1[mat[k][j-m]] == cnt[mat[k][j-m]]) samecount--;
                cnt1[mat[k][j-m]]--;
                if(mat[i][j] != mat[k][j] && cnt[mat[i][j]] == cnt1[mat[i][j]]) samecount--;
                cnt[mat[i][j]]++;
                if(mat[i][j] != mat[k][j] && cnt[mat[k][j]] == cnt1[mat[k][j]]) samecount--;
                cnt1[mat[k][j]]++;
                if(mat[i][j] != mat[k][j] && cnt[mat[i][j]] == cnt1[mat[i][j]]) samecount++;
                if(mat[i][j] != mat[k][j] && cnt[mat[k][j]] == cnt1[mat[k][j]]) samecount++;
                if(samecount==26 && maxsuff[i][k]>=(n-j-1) && maxpref[i][k]>=(j-m+1)) possible = true;
                //cout<<i<<" "<<k<<" "<<samecount<<endl;
            }
        }
    }
    for(int i = 0;i<(n-1);i++){
        for(int l = i+1;l<n;l++) {
            if (maxpref[i][l]==n) possible = true;
        }
    }
    if(possible) cout<<"DA"<<endl;
    else cout<<"NE"<<endl;
}

Compilation message (stderr)

ispit.cpp: In function 'int32_t main()':
ispit.cpp:26:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j =0 ;j<s.length();j++){
                       ~^~~~~~~~~~~

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