Submission #164221

#	Time	Username	Problem	Language	Result	Execution time	Memory
164221		aggu_01000101	Ispit (COCI19_ispit)	C++14	0 / 90	160 ms	51568 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;
    char mat[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];
        }
    }
    int freq[n][n][26];
    for(int i = 0;i<n;i++){
        for(int j =0 ;j<n;j++){
            for(int k = 0;k<26;k++){
                freq[i][j][k] = 0;
            }
        }
    }
    for(int i = 0;i<n;i++){
        freq[i][0][mat[i][0] - 'a']=1;
        for(int j = 1;j<n;j++){
            for(int k = 0;k<26;k++){
                freq[i][j][k]=freq[i][j-1][k];
            }
            freq[i][j][mat[i][j]-'a']++;
        }
    }
    bool possible = false;
    for(int i = 0;i<=(n-m);i++){
        int last = i+m-1;
        for(int j = 0;j<(n-1);j++){
            bool firstsame = true;
            bool lastsame = true;
            bool charcountsame = true;
            for(int k = 0;k<i;k++){
                if(mat[j][k]!=mat[j+1][k]) firstsame = false;
            }
            for(int k = last+1;k<n;k++){
                if(mat[j][k]!=mat[j+1][k]) lastsame = false;
            }
            for(int k = 0;k<26;k++){
                int count1 = freq[j][last][k] - i==0?0:freq[j][i-1][k];
                int count2 = freq[j+1][last][k] - i==0?0:freq[j+1][i-1][k];
                if(count1!=count2) charcountsame = false;
            }
            if(firstsame&&lastsame&&charcountsame) possible = true;
        }
    }
    for(int i = 0;i<(n-1);i++){
        bool same = true;
        for(int j = 0;j<n;j++){
            if(mat[i][j]!=mat[i+1][j]) same = false;
        }
        if(same) possible = true;
    }
    if(possible) cout<<"DA"<<endl;
    else cout<<"NE"<<endl;
}

Compilation message (stderr)

ispit.cpp: In function 'int32_t main()':
ispit.cpp:23:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j =0 ;j<s.length();j++){
                       ~^~~~~~~~~~~

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