Submission #362796

#	Time	Username	Problem	Language	Result	Execution time	Memory
362796		keta_tsimakuridze	Maxcomp (info1cup18_maxcomp)	C++14	60 / 100	1090 ms	184268 KiB

maxcomp

#include<bits/stdc++.h>
#define f first
#define s second
#define pii pair< pair<int,pair<int,int > > ,pair<int,int> > 
using namespace std;
const int N=1e3+5,INF=2e9;
int n,m,dist[N][N][2][2],k,i,ans,a[N][N];
int a1[]={0,0,-1,1},a2[]={-1,1,0,0};
priority_queue<pii,vector<pii>,greater<pii> > q;
bool ok(int x,int y){
	if(min(x,y)<1 || x>n || y>m ) return 0;
	return 1;
}
 main(){
 	ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
	cin>>n>>m;
	for(k=1;k<=n;k++){
		for(int i=1;i<=m;i++){
			cin>>a[k][i];
			for(int b1=0;b1<=1;b1++){
					for(int b2=0;b2<=1;b2++){
						int cur = 0;
						if(0!=b1) cur += a[k][i];
						if(0!=b2) cur -= a[k][i];
							dist[k][i][b1][b2] = cur;
							q.push({{cur,{k,i}},{b1,b2}});
					}
				}
		}
	}
	ans = INF;
	while(q.size()){
		int k=q.top().f.s.f;
		int i=q.top().f.s.s;
		int d=q.top().f.f;
		int c1=q.top().s.f;
		int c2=q.top().s.s; 
		q.pop();
		if(dist[k][i][c1][c2] < d) continue;
		if(c1+c2==2 ) ans=min(ans,d); 
		for(int j=0;j<4;j++){
			if(ok(k+a1[j],i+a2[j])){
				for(int b1=c1;b1<=1;b1++){
					for(int b2=c2;b2<=1;b2++){
						int cur = d + 1;
						if(c1!=b1) cur += a[k+a1[j]][i+a2[j]];
						if(b2!=c2) cur -= a[k+a1[j]][i+a2[j]];
						if(dist[k+a1[j]][i+a2[j]][b1][b2] > cur){
							dist[k+a1[j]][i+a2[j]][b1][b2] = cur;
							q.push({{cur,{k+a1[j],i+a2[j]}},{b1,b2}});
						}
					}
				}
			}
		}
	}
	cout<<-ans-1;
}

Compilation message (stderr)

maxcomp.cpp:14:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   14 |  main(){
      |       ^

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