1810642_ac_30ms_36k.c

来自「北大大牛代码 1240道题的原代码 超级权威」· C语言 代码 · 共 26 行

#include <stdio.h>

int main()
{
 double n,s,c1,c2,y,wn,i;
 double cost,min;
 scanf("%lf %lf",&n,&s);
 scanf("%lf %lf",&c1,&y);
 cost = c1 * y;
 wn = 0;
 for (i = 1; i < n; i++)
 {
  scanf("%lf %lf",&c2,&y);
  min = s * (i - wn) + c1;
  if (min < c2)
    { cost += min * y; }
  else
    {
     cost += c2 * y;
     wn = i;
     c1 = c2;
    }
 }
 printf("%.0lf",cost);
 return 0;
}