UVA 567 - Risk(Flyod)
还是有点裸的,看懂题意就OK了,第一次没有用EOF,超时。。。2Y,输入输出比较繁琐。
1 #include <stdio.h> 2 #include <string.h> 3 #define N 1000000 4 int map[21][21]; 5 void floyd() 6 { 7 int i,j,k; 8 for(k = 1; k <= 20; k ++) 9 for(i = 1; i <= 20; i ++) 10 for(j = 1; j <= 20; j ++) 11 { 12 if(map[i][j] > map[i][k] + map[k][j]&&map[i][k] != N&&map[k][j] != N) 13 map[i][j] = map[i][k] + map[k][j]; 14 } 15 } 16 int main() 17 { 18 int i,j,s,sv,ev,n,num = 0; 19 while(scanf("%d",&s)!=EOF) 20 { 21 for(i = 1; i <= 20; i ++) 22 { 23 for(j = 1; j <= 20; j ++) 24 map[i][j] = N; 25 map[i][i] = 0; 26 } 27 num ++; 28 for(i = 1; i <= 19; i ++) 29 { 30 if(i > 1) 31 scanf("%d",&s); 32 for(j = 1; j <= s; j ++) 33 { 34 scanf("%d",&ev); 35 map[i][ev] = 1; 36 map[ev][i] = 1; 37 } 38 } 39 floyd(); 40 printf("Test Set #%d\n",num); 41 scanf("%d",&n); 42 for(i = 1; i <= n; i ++) 43 { 44 scanf("%d%d",&sv,&ev); 45 if(sv < 10) 46 printf(" %d",sv); 47 else 48 printf("%d",sv); 49 printf(" to "); 50 if(ev < 10) 51 printf(" %d: ",ev); 52 else 53 printf("%d: ",ev); 54 printf("%d\n",map[sv][ev]); 55 } 56 printf("\n"); 57 } 58 return 0; 59 }