Submission #237067

#	Time	Username	Problem	Language	Result	Execution time	Memory
237067		DodgeBallMan	Genetics (BOI18_genetics)	C++14	100 / 100	336 ms	23416 KiB

genetics

#include <bits/stdc++.h>

using namespace std;

const int N = 4200;
long long k, po[N], hsh[N][6], P = 1e9+7, all;
char s[N][N];
int n, m;

int f( char c ) {
    if( c == 'A' ) return 1;
    else if( c == 'T' ) return 2;
    else if( c == 'C' ) return 3;
    else return 4;
}

int main()
{
    scanf("%d %d %lld",&n,&m,&k);
    po[0] = 1;
    for( int i = 1 ; i <= n ; i++ ) po[i] = po[i-1] * P, all += po[i]; 
    for( int i = 1 ; i <= n ; i++ ) {
        scanf("%s",&s[i][1]);
        for( int j = 1 ; j <= m ; j++ ) hsh[j][f(s[i][j])] += po[i];
    }
    for( int i = 1 ; i <= n ; i++ ) {
        long long now = 0;
        for( int j = 1 ; j <= m ; j++ ) now += all - hsh[j][f(s[i][j])];
        //printf("%lld\n",now);
        if( now + k*po[i] == all * k ) return !printf("%d",i);
    }
    return 0;
}

Compilation message (stderr)

genetics.cpp: In function 'int main()':
genetics.cpp:19:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d %lld",&n,&m,&k);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~
genetics.cpp:23:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%s",&s[i][1]);
         ~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 27 / 27
• Subtask 2: 19 / 19
• Subtask 3: 28 / 28
• Subtask 4: 26 / 26