1046 Shortest Distance

这道题虽然也是一道模拟题，但是直接模拟，第三个测试点超时了...
这道题还是需要一点技巧的。

#include<iostream>
using namespace std;
const int maxn = 100010;
int a[maxn] = { 0 };
int main() {
    int n, dis, m, st, ed;
    int sum = 0;
    scanf("%d", &n);
    for (int i = 1; i <= n; i++) {
        scanf("%d", &dis);
        sum += dis;
        a[i] = sum;
    }
    scanf("%d", &m);
    for (int i = 0; i < m; i++) {
        scanf("%d %d", &st, &ed);
        if (st > ed) {
            swap(st, ed);
        }
        int ans1 = a[ed - 1] - a[st - 1];
        int ans2 = sum - ans1;
        printf("%d\n", ans1 < ans2 ? ans1 : ans2);
    }
    return 0;
}