#include <stdio.h>
#include <vector>
using namespace std;
typedef pair<int,int> P;
vector<P> line[32];
int n, m;
//int line[34][34][3];
int x, y, z, cnt, now, how;
double plus[54][34], ans=0, fast;
int times;
int main() {
// freopen("input.txt", "r", stdin);
scanf("%d %d", &n, &m);
int i, j;
P temp;
for(i=1; i<=m; i++) {
scanf("%d %d %d", &x, &y, &z);
temp.first=y;temp.second=z;
line[x].push_back(temp);
/*
line[x][0][0]++;
line[x][line[x][0][0]][0]=y;
line[x][line[x][0][0]][1]=z;
*/
}
plus[0][0]=1;
while(times<=99) {
for(i=0; i<n; i++) {
how=line[i].size();
if(how==0 || plus[times%51][i]==0) continue;
for(j=0; j<how; j++) {
plus[(times+line[i][j].second)%51][line[i][j].first]+=((double)1/(double)how)*plus[times%51][i];
}
plus[times%51][i]=0;
}
if(plus[times%51][n]!=0) {
fast=(plus[times%51][n]*(double)times);
// printf("%.50lf\n", fast);
if(fast<0.000000000005) break;
ans+=fast;
plus[times%51][n]=0;
}
times++;
}
// printf("%d", times);
printf("%.9lf\n", ans);
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
1220 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
