Submission #967475

#	Time	Username	Problem	Language	Result	Execution time	Memory
967475		MilosMilutinovic	Patkice (COCI20_patkice)	C++14	50 / 50	1 ms	696 KiB

patkice

#include<bits/stdc++.h>
 
#define pb push_back
#define fi first
#define se second
#define mp make_pair
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef long double ld;
 
template <typename T> bool chkmin(T &x,T y){return x>y?x=y,1:0;}
template <typename T> bool chkmax(T &x,T y){return x<y?x=y,1:0;}
 
ll readint(){
	ll x=0,f=1; char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
	while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}
	return x*f;
}

const int dx[]={1,0,-1,0};
const int dy[]={0,1,0,-1};
const string str="SENW";
int n,m;
char s[105][105];
bool was[105][105];

bool valid(int x,int y){
	return 1<=x&&x<=n&&1<=y&&y<=m;
}

int main(){
	scanf("%d%d",&n,&m);
	for(int i=1;i<=n;i++) scanf("%s",s[i]+1);
	int sx,sy,fx,fy;
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++){
			if(s[i][j]=='o'){
				sx=i;
				sy=j;
			}
			if(s[i][j]=='x'){
				fx=i;
				fy=j;
			}
		}
	}
	char res='a';
	int mn=10000;
	for(int dir=0;dir<4;dir++){
		if(!valid(sx+dx[dir],sy+dy[dir])){
			continue;
		}
		for(int i=1;i<=n;i++){
			for(int j=1;j<=m;j++){
				was[i][j]=false;
			}
		}
		int cnt=1,cx=sx+dx[dir],cy=sy+dy[dir];
		was[cx][cy]=true;
		while(cx!=fx||cy!=fy){
			int nx=cx,ny=cy;
			if(s[cx][cy]=='^') nx=cx-1,ny=cy;
			if(s[cx][cy]=='v') nx=cx+1,ny=cy;
			if(s[cx][cy]=='<') nx=cx,ny=cy-1;
			if(s[cx][cy]=='>') nx=cx,ny=cy+1;
			if(!valid(nx,ny)||was[nx][ny]) break;
			cnt++;
			cx=nx;
			cy=ny;
			was[cx][cy]=true;
		}
		if(cx==fx&&cy==fy){
			if(cnt<mn){
				mn=cnt;
				res=str[dir];
			}else if(cnt==mn){
				chkmin(res,str[dir]);
			}
		}
	}	
	if(res=='a') printf(":(");
	else printf(":)\n%c",res);
	return 0;
}

Compilation message (stderr)

patkice.cpp: In function 'int main()':
patkice.cpp:38:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |  scanf("%d%d",&n,&m);
      |  ~~~~~^~~~~~~~~~~~~~
patkice.cpp:39:29: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |  for(int i=1;i<=n;i++) scanf("%s",s[i]+1);
      |                        ~~~~~^~~~~~~~~~~~~
patkice.cpp:66:19: warning: 'fy' may be used uninitialized in this function [-Wmaybe-uninitialized]
   66 |   while(cx!=fx||cy!=fy){
      |                 ~~^~~~
patkice.cpp:66:11: warning: 'fx' may be used uninitialized in this function [-Wmaybe-uninitialized]
   66 |   while(cx!=fx||cy!=fy){
      |         ~~^~~~
patkice.cpp:56:12: warning: 'sy' may be used uninitialized in this function [-Wmaybe-uninitialized]
   56 |   if(!valid(sx+dx[dir],sy+dy[dir])){
      |       ~~~~~^~~~~~~~~~~~~~~~~~~~~~~
patkice.cpp:56:12: warning: 'sx' may be used uninitialized in this function [-Wmaybe-uninitialized]

• Subtask 1: 30 / 30
• Subtask 2: 20 / 20