Submission #1796116

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Source Code Expand

#include <iostream>
#include <stdio.h>
#include <math.h>
#include <string.h>
#include <time.h>
#include <stdlib.h>
#include <string>
#include <bitset>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <algorithm>
#include <sstream>
#include <stack>
#include <iomanip>
using namespace std;
#define pb push_back
#define mp make_pair
typedef pair<int,int> pii;
typedef long long ll;
typedef double ld;
typedef vector<int> vi;
#define fi first
#define se second
#define fe first
#define FO(x) {freopen(#x".in","r",stdin);freopen(#x".out","w",stdout);}
#define Edg int M=0,fst[SZ],vb[SZ],nxt[SZ];void ad_de(int a,int b){++M;nxt[M]=fst[a];fst[a]=M;vb[M]=b;}void adde(int a,int b){ad_de(a,b);ad_de(b,a);}
#define Edgc int M=0,fst[SZ],vb[SZ],nxt[SZ],vc[SZ];void ad_de(int a,int b,int c){++M;nxt[M]=fst[a];fst[a]=M;vb[M]=b;vc[M]=c;}void adde(int a,int b,int c){ad_de(a,b,c);ad_de(b,a,c);}
#define es(x,e) (int e=fst[x];e;e=nxt[e])
#define esb(x,e,b) (int e=fst[x],b=vb[e];e;e=nxt[e],b=vb[e])
int h,w,k,d[888][888],dx[]={-1,1,0,0},dy[]={0,0,-1,1};
char a[888][888];
void bfs(int x,int y)
{
	queue<pii> q;
	d[x][y]=0; q.push(pii(x,y));
	while(!q.empty())
	{
		pii s=q.front(); q.pop();
		for(int g=0;g<4;++g)
		{
			pii w=s; w.fi+=dx[g]; w.se+=dy[g];
			if(d[w.fi][w.se]<=d[s.fi][s.se]+1||a[w.fi][w.se]!='.') continue; 
			d[w.fi][w.se]=d[s.fi][s.se]+1; q.push(w);
		}
	}
}
int main()
{
	memset(d,127/3,sizeof d);
	scanf("%d%d%d",&h,&w,&k);
	int sx,sy;
	for(int i=1;i<=h;++i)
	{
		scanf("%s",a[i]+1);
		for(int j=1;j<=w;++j)
			if(a[i][j]=='S') sx=i,sy=j,a[i][j]='.';
	}
	bfs(sx,sy);
	int ans=1e9;
	for(int i=1;i<=h;++i)
		for(int j=1;j<=w;++j) if(d[i][j]<=k)
		{
			int g=min(min(i-1,h-i),min(j-1,w-j));
			ans=min(ans,(g+k-1)/k); 
		}
	printf("%d\n",ans+1);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:52:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d",&h,&w,&k);
                          ^
./Main.cpp:56:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s",a[i]+1);
                     ^

Judge Result