제출 #484500

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
484500		MilosMilutinovic	Nautilus (BOI19_nautilus)	C++14	100 / 100	61 ms	644 KiB

nautilus

#pragma GCC optimize ("Ofast")
#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,n) for (int i=a;i<n;i++)
#define per(i,a,n) for (int i=n-1;i>=a;i--)
#define pb push_back
#define mp make_pair
#define all(x) (x).begin(),(x).end()
#define fi first
#define se second
#define SZ(x) ((int)(x).size())
typedef vector<int> VI;
typedef long long ll;
typedef pair<int,int> PII;
typedef double db;
mt19937 mrand(random_device{}());
const ll mod=1000000007;
int rnd(int x) { return mrand() % x;}
ll powmod(ll a,ll b) {ll res=1;a%=mod; assert(b>=0); for(;b;b>>=1){if(b&1)res=res*a%mod;a=a*a%mod;}return res;}
ll gcd(ll a,ll b) { return b?gcd(b,a%b):a;}
// head

const int N=505;
int n,m,k;
char s[N],pt[10*N];
bitset<N> g[N],dp[N][2];
int main() {
	scanf("%d%d%d",&n,&m,&k);
	rep(i,1,n+1) {
		scanf("%s",s+1);
		rep(j,1,m+1) g[i][j]=(s[j]=='.'?1:0);
	}
	rep(i,1,n+1) dp[i][0]=g[i];
	scanf("%s",pt+1);
	rep(x,1,k+1) {
		rep(i,1,n+1) dp[i][1]=dp[i][0];
		if (pt[x]=='N') {
			rep(i,1,n+1) dp[i][0]=dp[i+1][1];
		}
		if (pt[x]=='S') {
			rep(i,1,n+1) dp[i][0]=dp[i-1][1];
		}
		if (pt[x]=='W') {
			rep(i,1,n+1) dp[i][0]=(dp[i][1]>>1);
		}
		if (pt[x]=='E') {
			rep(i,1,n+1) dp[i][0]=(dp[i][1]<<1);
		}
		if (pt[x]=='?') {
			rep(i,1,n+1) dp[i][0]=dp[i+1][1];
			rep(i,1,n+1) dp[i][0]|=dp[i-1][1];
			rep(i,1,n+1) dp[i][0]|=(dp[i][1]>>1);
			rep(i,1,n+1) dp[i][0]|=(dp[i][1]<<1);
		}
		rep(i,1,n+1) dp[i][0]&=g[i];
	}
	int ans=0;
	rep(i,1,n+1) ans+=dp[i][0].count();
	printf("%d",ans);
}

컴파일 시 표준 에러 (stderr) 메시지

nautilus.cpp: In function 'int main()':
nautilus.cpp:28:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |  scanf("%d%d%d",&n,&m,&k);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~
nautilus.cpp:30:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |   scanf("%s",s+1);
      |   ~~~~~^~~~~~~~~~
nautilus.cpp:34:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |  scanf("%s",pt+1);
      |  ~~~~~^~~~~~~~~~~

• Subtask 1: 29 / 29
• Subtask 2: 37 / 37
• Subtask 3: 34 / 34