Submission #18856

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Source Code Expand

#include<stdio.h>
#include<stdlib.h>
#include<math.h>
#include<string.h>
#define REP(i,a,b) for(i=a;i<b;i++)
#define rep(i,n) REP(i,0,n)

unsigned myrand(){
  static unsigned x=123456789, y=362436069, z=521288629, w=88675121;
  unsigned t;
  t = (x^(x<<11));
  x=y; y=z; z=w;
  w = (w^(w>>19))^(t^(t>>8));
  return w;
}

int main(){
  int i,j,k,l,m,n,loop;
  int now[12];
  int lis[20][20];
  double ok, dame;

  scanf("%d%d%d",&n,&m,&k);
  rep(i,n) rep(j,n) lis[i][j] = 0;
  while(m--){
    scanf("%d%d",&i,&j);
    lis[i][j] = lis[j][i] = 1;
  }

  ok = dame = 0;
  rep(loop,16000000){
    rep(i,n) now[i] = i;
    rep(l,k){
      i = myrand() % n;
      j = myrand() % (n-1);
      if(j <= i) j++;
      m = now[i]; now[i] = now[j]; now[j] = m;
    }
    m = 0;
    rep(i,n-1) m += lis[now[i]][now[i+1]];
    m += lis[now[n-1]][now[0]];
    if(m) dame += 1; else ok += 1;
  }

  printf("%.10f\n",ok/(ok+dame));

  return 0;
}

Submission Info

Compile Error

./Main.c: In function ‘main’:
./Main.c:23: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result
./Main.c:26: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result

Judge Result