uva 507 Jill Rides Again(最长子串和)

长度相等时去起点小的

貌似每次写最长子串和时代码都不一样

#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;
const int N = 20000+10;
int num[N];
int main(void)
{
//    freopen("1.txt", "r", stdin);
//    freopen("2.txt", "w", stdout);
    int kase, n, cnt = 1;
    scanf("%d", &kase);
    while(kase--)
    {
        scanf("%d", &n);
        memset(num, 0, sizeof(num));
        int ok = 0;
        for(int i = 1;i < n;i++)
            {
                scanf("%d", &num[i]);
                if(num[i] > 0)
                    ok = 1;
            }
        int s = 1, e = 1, pos = 1, sum = num[1], _max = num[1];
        for(int i = 2;i < n;i++)
        {
            if(sum < 0)
            {
                pos = i;
                sum = 0;
            }
            sum += num[i];
            if((_max < sum) || (_max == sum && i-pos > e-s))
            {
                _max = sum;
                s = pos;
                e = i;
            }
        }
        if(ok)
            printf("The nicest part of route %d is between stops %d and %d\n", cnt++, s, e+1);
        else
            printf("Route %d has no nice parts\n", cnt++);
    }
    return 0;
}