Submission #477428

#	Time	Username	Problem	Language	Result	Execution time	Memory
477428		maks007	Maxcomp (info1cup18_maxcomp)	C++14	0 / 100	18 ms	460 KiB

maxcomp

#include "bits/stdc++.h"

using namespace std;

using ld = long double;

#define int long long
#define ss second
#define ff first
#define pii pair <int, int>
#define undef -1
#define inf INT_MAX
#define PI acos((ld)-1); 
#define NoTime ios::sync_with_stdio(0); cin.tie(0);
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()


void setIO(string str){
	if(str == "") return;
	freopen((str+".in").c_str(), "r", stdin);
	freopen((str+".out").c_str(), "w", stdout);
}

vector <vector <int>> g;
vector <vector <int>> used;
int mn = -inf;

int it[] = {0, 0, 1, -1};
int jt[] = {1, -1, 0, 0};

void dfs(int i, int j, int dep, int xv, int nv){
	used[i][j] = 1;
	mn = max(mn, xv - nv - dep);
	for(int to = 0; to < 4; to++){
		int ni = i + it[to],
			nj = j + jt[to];
		if(!used[ni][nj] && g[ni][nj] != -1) dfs(ni, nj, dep + 1, max(xv, g[ni][nj]), min(nv, g[ni][nj]));
	}
}

int32_t main(void){
	NoTime
	setIO("");
	int n, m;
	cin >> n >> m;
	g.resize(n + 2, vector <int> (m + 2, undef));
	used.resize(n + 2, vector <int> (m + 2));
	//int a[n][m];
	for(int i = 1; i <= n; i++){
		for(int j = 1; j <= m; j++) cin >> g[i][j];
	}
	
	for(int i = 1; i <= n; i++){
		for(int j = 1; j <= m; j++){
			dfs(i, j, 0, g[i][j], g[i][j]);
			used.assign(n + 2, vector <int> (m + 2, 0));
			
		}
	}
	cout << mn;
	return 'm' - 109;
}

Compilation message (stderr)

maxcomp.cpp: In function 'void setIO(std::string)':
maxcomp.cpp:21:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |  freopen((str+".in").c_str(), "r", stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
maxcomp.cpp:22:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |  freopen((str+".out").c_str(), "w", stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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