Submission #67021

#	Time	Username	Problem	Language	Result	Execution time	Memory
67021		osmanorhan	Maxcomp (info1cup18_maxcomp)	C++17	100 / 100	361 ms	27528 KiB

maxcomp

#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <string>
#include <cmath>
#include <climits>
#include <algorithm>
#include <iostream>
#include <map>
#include <queue>
#include <set>
#include <stack>
#include <cassert>
#include <vector>
#define all(x) x.begin() , x.end()
#define fi first
#define se second
#define pb push_back
#define umax( x , y ) x = max( x , (y) )
#define umin( x , y ) x = min( x , (y) )
#define For( i , a ) for(int i=1;i<=a;i++)
#define ort (b+s)/2
#define y2 asrwjaelkf
#define y1 asseopirwjaelkf
#define set multiset

using namespace std;

typedef long long Lint;
typedef double db;
typedef pair<int,int> ii;
typedef pair<int,char> ic;
typedef pair<db,db> dd;
typedef pair<int,ii> iii;
typedef pair<ii,ii> i4;

const int maxn = 1020;
const int maxm = 1000020;
const int MOd = 998244353;

int ar[maxn][maxn];
bool used[maxn][maxn];
queue<iii> q;
int yol[4][2] = {{1,0},{0,1},{-1,0},{0,-1}};
vector<iii> v;

int main() {

    //freopen("asd.in","r",stdin);
    //freopen("output17.txt","w",stdout);

    int a, b;
    scanf("%d %d",&a,&b);
    for(int i=1;i<=a;i++)
    	for(int j=1;j<=b;j++) {
    		scanf("%d",&ar[i][j]);
    		v.pb( iii( ar[i][j], ii( i, j ) ) );
    	}
    sort( all( v ) );
    int last = v.size()-1;
    int ans = -1e9;
    q.push( v[last--] );
    while( !q.empty() ) {
    	int mal = q.front().fi;
    	int x = q.front().se.fi;
    	int y = q.front().se.se;
    	q.pop();
    	if( used[x][y] ) continue;
    	used[x][y]=1;
    	while( last >= 0 && v[last].fi == mal )
    		q.push( v[last--] );
    	umax( ans, mal-ar[x][y]-1 );
    	for(int i=0;i<4;i++) {
    		int gox = x + yol[i][0];
    		int goy = y + yol[i][1];
    		if( 0 < gox && gox <= a && 0 < goy && goy <= b && !used[gox][goy] )
    			q.push( iii( mal-1, ii( gox, goy ) ) );
    	}
    }
    cout << ans << endl;
	return 0;
}

Compilation message (stderr)

maxcomp.cpp: In function 'int main()':
maxcomp.cpp:53:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d",&a,&b);
     ~~~~~^~~~~~~~~~~~~~~
maxcomp.cpp:56:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
       scanf("%d",&ar[i][j]);
       ~~~~~^~~~~~~~~~~~~~~~

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