close
https://onlinejudge.org/index.php?option=onlinejudge&Itemid=8&page=show_problem&problem=4797
#include <stdio.h>
#include <stdlib.h>
int main() {
int n;
scanf("%d", &n);
while (n--) {
long long int a, b;
scanf("%lld %lld", &a, &b);
long long int ans;
ans = (b + b - a - 1) * a / 2 ;
printf("%lld\n",ans);
}
return 0;
}
文章標籤
全站熱搜
留言列表
