标签:style blog http color io os ar for sp
flyod 就可以 ,N只有20.不过感觉直接BFS好像行?
#include <map> #include <set> #include <list> #include <cmath> #include <ctime> #include <deque> #include <stack> #include <queue> #include <cctype> #include <cstdio> #include <string> #include <vector> #include <climits> #include <cstdlib> #include <cstring> #include <iostream> #include <algorithm> #define LL long long #define PI 3.1415926535897932626 using namespace std; int gcd(int a, int b) {return a % b == 0 ? b : gcd(b, a % b);} #define MAXN 25 const int INF = 0x3f3f3f3f; int dist[MAXN][MAXN]; int cnt; void read() { memset(dist,0x3f,sizeof(dist)); for (int i = 1; i <= cnt; i++) { int tmp; scanf("%d",&tmp); dist[1][tmp] = dist[tmp][1] = 1; } for (int i = 2; i <= 19; i++) { scanf("%d",&cnt); for (int j = 1; j <= cnt; j++) { int tmp; scanf("%d",&tmp); dist[i][tmp] = dist[tmp][i] = 1; } } } int main() { //freopen("sample.txt","r",stdin); int kase = 1; while (scanf("%d",&cnt) != EOF) { read(); for (int k = 1; k <= 20; k++) for (int i = 1; i <= 20; i++) for (int j = 1; j <= 20; j++) dist[i][j] = min(dist[i][j],dist[i][k] + dist[k][j]); int N; scanf("%d",&N); printf("Test Set #%d\n",kase++); for (int i = 1; i <= N; i++) { int u,v; scanf("%d%d",&u,&v); printf("%2d to %2d: %d\n",u,v,dist[u][v]); } putchar(‘\n‘); } return 0; }
标签:style blog http color io os ar for sp
原文地址:http://www.cnblogs.com/Commence/p/4006111.html