poj3213
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只因用scanf+%d输入longlong 无限wa
#include <iostream>#include <cstring>#include <ctime>using namespace std;
#define maxn 1002int n,m,p;long long A[maxn][maxn],B[maxn][maxn],C[maxn][maxn];long long H[maxn];long long temp[maxn];long long TAB[maxn],TC[maxn];long long jemp[maxn];void trans1 ( char s [], long long int & n ) { int i = 0 ; int flag = 1 ; if ( s [ 0 ]== '-' ) { flag =- 1 ; i ++; } long long int sum = 0 ; for ( int j = i ; s [ j ]; j ++) { sum = sum * 10 + s [ j ]- '0' ; } n =( long long ) flag * sum ; return ;
} void mult1(){ for(int i=1;i<=p;i++) { long long sum=0; for(int j=1;j<=n;j++) sum+=H[j]*A[j][i]; jemp[i]=sum; //printf(" %lld",jemp[i]); } for(int i=1;i<=m;i++) { long long sum=0; for(int j=1;j<=p;j++) sum+=jemp[j]*B[j][i]; TAB[i]=sum; } for(int i=1;i<=m;i++) { long long sum=0; for(int j=1;j<=n;j++) sum+=H[j]*C[j][i]; TC[i]=sum; }
}int main(){ while(scanf("%d%d%d",&n,&p,&m)==3) { memset(A,0,sizeof(A)); memset(B,0,sizeof(B)); memset(C,0,sizeof(C)); char s [ 30 ]; for ( int i = 1 ; i <= n ; i ++) for ( int j = 1 ; j <= p ; j ++) { scanf ( "%s" , s ); trans1 ( s , A [ i ][ j ]); }
for ( int i = 1 ; i <= p ; i ++) for ( int j = 1 ; j <= m ; j ++) { scanf ( "%s" , s ); trans1 ( s , B [ i ][ j ]); } for ( int i = 1 ; i <= n ; i ++) for ( int j = 1 ; j <= m ; j ++) { scanf ( "%s" , s ); trans1 ( s , C [ i ][ j ]); } for(int i=1;i<=n;i++)H[i]=rand()%2000;
mult1(); int ansy=-1; for(int i=1;i<=m;i++)if(TC[i]!=TAB[i]){ansy=i;break;} if(ansy==-1) printf("Yes\n"); else for(int i=1;i<=n;i++) { long long sum=0; for(int j=1;j<=p;j++) sum+=A[i][j]*B[j][ansy]; if(sum!=C[i][ansy]) { printf("No\n%d %d\n%lld\n",i,ansy,sum); break; } }
}return 0;}
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