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void spmv(int n,int xptr[], int yidx[], int vals[], int b[], int x[]){
int i, j, k;
i = 0;
while (i < n){
x[i] = 0;
i = i + 1;
}
i = 0;
while (i < n){
j = xptr[i];
while (j < xptr[i + 1]){
x[yidx[j]] = x[yidx[j]] + vals[j];
j = j + 1;
}
j = xptr[i];
while (j < xptr[i + 1]){
x[yidx[j]] = x[yidx[j]] + vals[j] * (b[i] - 1);
j = j + 1;
}
i = i + 1;
}
}
const int N = 100010;
const int M = 3000000;
int x[N], y[M], v[M];
int a[N], b[N], c[N];
int main(){
int n = getarray(x) - 1;
int m = getarray(y);
getarray(v);
getarray(a);
starttime();
int i = 0;
while (i < 5){
spmv(n, x, y, v, a, b);
spmv(n, x, y, v, b, a);
i=i+1;
}
stoptime();
putarray(n, b);
return 0;
}
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