杭电OJ 1003

Posted 2020-12-08 kakagoult

#include <iostream>
#include <string>
using namespace std;
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define SWAP(a,b) auto c=a;a=b;b=c;


int main()
{
    int n, num_amount, num, max, start, end, temp_start, accu;
    cin >> n;
    FOR(i, 1, n+1){
        cin >> num_amount;
        max = -1001;
        temp_start = accu = 0;

        FOR(temp_end, 0, num_amount){
            cin >> num;
            accu += num;
            if (accu > max){
                start = temp_start;
                end = temp_end;
                max = accu;
            }
            if(accu < 0){
                accu = 0;
                temp_start = temp_end + 1;
            }
        }
        cout << "Case " << i << ":" << endl;
        cout << max << " " << start + 1 << " " << end + 1 << endl;
        if(i != n) cout << endl;
    }
    return 0;
}

经典的最大字串和问题，没什么好说的，当尝试中的字串和小于 0 时就放弃这个字串，改为尝试以下一个标号开始的字串。