제출 #67005

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
67005		ekrem	Maxcomp (info1cup18_maxcomp)	C++98	60 / 100	515 ms	71932 KiB

maxcomp

#include <bits/stdc++.h>
#define st first
#define nd second
#define mp make_pair
#define pb push_back
#define inf 2000000007
#define N 1005
using namespace std;
typedef long long ll;
ll n, m, ans = -inf, a[N][N], dp[N][N][4][2];
ll o[] = {-1, 0, 1, 0};
ll p[] = {0, 1, 0, -1};

ll f(ll i, ll j, ll yon, ll dur){
	ll &r = dp[i][j][yon][dur];
	if(r != -1)
		return r;
	if(i < 1 or j < 1 or i > n or j > m)
		return -inf;
	if(dur == 0){
		if(a[i][j] > f(i + o[yon], j + p[yon], yon, dur) - 1)
			r = a[i][j];
		else
			r = f(i + o[yon], j + p[yon], yon, dur) - 1;
	}
	if(dur == 1){
		if(-a[i][j] > f(i + o[yon], j + p[yon], yon, dur) - 1)
			r = -a[i][j];
		else
			r = f(i + o[yon], j + p[yon], yon, dur) - 1;
	}
	return r;
}

int main() {
	// freopen("in.txt", "r", stdin);
	// freopen("out.txt", "w", stdout);
	memset(dp, -1, sizeof dp);
	scanf("%lld %lld",&n ,&m);
	for(ll i = 1; i <= n; i++)
		for(ll j = 1; j <= m; j++)
			scanf("%lld",&a[i][j]);
	for(ll i = 1; i <= n; i++)
		for(ll j = 1; j <= m; j++)
			for(ll l = 0; l <= 3; l++)
				for(ll k = 0; k <= 3; k++)
					if(l != k){
						ans = max(ans, f(i, j, l, 0) + f(i, j, k, 1) - 1 );
					}

	printf("%lld\n",ans);
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

maxcomp.cpp: In function 'int main()':
maxcomp.cpp:39:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld %lld",&n ,&m);
  ~~~~~^~~~~~~~~~~~~~~~~~~~
maxcomp.cpp:42:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%lld",&a[i][j]);
    ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 15 / 15
• Subtask 3: 30 / 30
• Subtask 4: 0 / 40