uva116 多阶段决策

 一开始觉得思路问题不大就是WA，打了个球回来又看了会，可能是自己默认测试数据全为正数了，改了下判断的逻辑就ac了

 

#include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>

using namespace std;

int matrix[15][105];
int d[15][105];
int m, n;
int nextr[15][105];

int main()
{
    
    while (cin >> m >> n)
    {
        for (int i = 0;i < m;i++)
            for (int j = 0;j < n;j++)
                cin >> matrix[i][j];
        //最后一列边界情况
        for (int i = 0;i < m;i++)
            d[i][n - 1] = matrix[i][n - 1];

        for(int c=n-2;c>=0;c--)
            for (int r = 0;r < m;r++)
            {
                d[r][c] = matrix[r][c];
                int a[3] = { r - 1,r,r + 1 };
                if (r == 0)a[0] = m - 1;
                if (r == m - 1)a[2] = 0;
                sort(a, a + 3);
                int minval = (1 << 30);//这道题测试数据有负数--
                for (int k = 0;k < 3;k++)
                {
                    if (minval>d[a[k]][c + 1])
                    {
                        minval = d[a[k]][c + 1];
                        nextr[r][c] = a[k];
                    }
                }
                d[r][c] += minval;
            }

        int ans = (1 << 30);
        int maxr;
        for (int i = 0;i < m;i++)
            if (ans > d[i][0])
            {
                ans = d[i][0];
                maxr = i;
            }
        cout << maxr + 1;
        for (int i = nextr[maxr][0], j = 0;j < n - 1;i = nextr[i][j])
        {
            cout << " " << i + 1;
            ++j;
        }
        
        cout << "\n" << ans << endl;
    }

    return 0;
}