Submission #3461

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
3461	2013-08-31 05:56:57	pichulia	Following Flow (kriii1_F)	C++98	0 / 1	0 ms	8192 KiB

F

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#include<stdio.h>
int n,m;
int a[35][35][3];
int an[35];
double d[35][500105];
double la;
int main(){
  int i,j,k,in1,in2,in3;
  scanf("%d %d",&n,&m);
  for(i=1;i<=m;i++){
    scanf("%d %d %d",&in1,&in2,&in3);
    a[in1][++an[in1]][0]=in2;
    a[in1][an[in1]][1]=in3;
  }
  d[0][0]=1;
  double op;
  for(i=0;i<=250000;++i){
    for(j=0;j<n;++j){
      if(an[j]!=0){
        op=d[j][i]/(double)an[j];
        for(k=an[j];k>=1;--k)
          d[a[j][k][0]][i+a[j][k][1]]+=op;
      }
    }
    la+=d[n][i]*i;
  }
  printf("%lf",la);
 
 
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• Subtask 1: 0 / 1