Pat 1003 甲级

#include <cstdlib>
#include <cstring>
#include <iostream>
#include <cstdio>
#include <cassert>
using namespace std;
#define N 505
int a[N];
long long mat[N][N], cnt[N][N], han[N][N];
int main() {
    int n, m, s, e;
    while (4 == scanf("%d%d%d%d", &n, &m, &s, &e)) {
        for (int i = ; i < n; ++i) {
            scanf("%d", a + i);
        }
        memset(mat, -, sizeof mat);
        memset(cnt, , sizeof cnt);
        memset(han, , sizeof han);
        while (m--) {
            int x, y, z;
            scanf("%d%d%d", &x, &y, &z);
            assert(!cnt[x][y]);
            mat[x][y] = mat[y][x] = z;
            cnt[x][y]++;
            cnt[y][x]++;
            han[x][y] = a[y];
            han[y][x] = a[x];
        }
        for (int i = ; i < n; ++i) {
            for (int j = ; j < n; ++j) {
                if (!cnt[j][i])continue;
                for (int k = ; k < n; ++k) {
                    if (!cnt[i][k])continue;
                    if (!cnt[j][k] || mat[j][k] > mat[j][i] + mat[i][k]) {
                        mat[j][k] = mat[j][i] + mat[i][k];
                        cnt[j][k] = cnt[j][i] * cnt[i][k];
                        han[j][k] = han[j][i] + han[i][k];
                    } else if (mat[j][k] == mat[j][i] + mat[i][k]) {
                        cnt[j][k] += cnt[j][i] * cnt[i][k];
                        han[j][k] = max(han[j][k], han[j][i] + han[i][k]);
                    }
                }
            }
        }
        if (s == e) {
            cout << 1 << ' ' << a[s] << endl;
        } else {
            cout << cnt[s][e] << ' ' << a[s] + han[s][e] << endl;
        }
    }
    return 0;
}
/*
5 6 0 2
1 2 1 5 3
0 1 1
0 2 2
0 3 1
1 2 1
2 4 1
3 4 1
 */