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#include <inttypes.h>
#include <stdio.h>

static uint64_t q[500000];

int main(void)
{
        uint32_t m,n,i,j,a[500000];
        uint64_t d,b,e = 0;
        scanf("%"SCNu32"%"SCNu32, &n, &m);
        for (i=0; i<n; i++)
                scanf("%"SCNu32, &a[i]);
        for (i=0; i<n; i++)
        {
                uint64_t s = 0;
                scanf("%"SCNu32"%"SCNu32, &d, &b);
                for (j=0; j<n; j++)
                {
                        uint64_t r = q[j]+(d-e)*a[j];
                        if (r > b)
                        {
                                q[j] = b;
                                s += r-b;
                        }
                        else
                        {
                                q[j] = r;
                        }
                }
                printf("%"PRIu64"\n", s);
                e = d;
        }
        return 0;
}