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救命啊啊啊啊啊啊啊啊啊!!!!!!!!!!!!!
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3 years ago
619 B
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#include <stdio.h>
int A[150][150];
int B[100007];
int C[100007];
int main(void){
    int N,x,y,D=1,i,j;

    scanf("%d",&N);
    for(int i=0;i<=120;i++){
        A[i][0]=1;
        for(int j=1;j<=120;j++){
            A[i][j]=0;
        }
    }
    for(int i=1;i<=120;i++){
        for(int j=1;j<=120;j++){
            A[i][j]=A[i-1][j-1]+A[i-1][j];
        }
    }

    for(int n=0;n<N;n++){
        scanf("%d",&B[n]);
    }
    for(int n=0;n<N;n++){
        scanf("%d",&C[n]);
    }
    for(int n=0;n<N;n++){
        D=D*A[(B[n])][(C[n])];
    }
    printf("%d\n",D);

    return 0;
}
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