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Submission #1000742

# Submission time Handle Problem Language Result Execution time Memory
1000742 2024-06-18T08:01:20 Z Baytoro Nafta (COI15_nafta) C++17
100 / 100
 478 ms 125008 KB 
#include <bits/stdc++.h>
//#include "island.h"
#define pb push_back
#define ll long long
#define fr first
#define sc second
#define all(x) x.begin(),x.end()
using namespace std;
#define ll long long
//#ifndef ONLINE_JUDGE
const int N=2005;
int a[N][N],used[N][N];
int sum[N*N],L[N*N],R[N*N];
int r,s;
void dfs(int x, int y, int c){
	if(used[x][y] || a[x][y]==-1 || x<=0 || x>r || y<=0 || y>s) return;
	used[x][y]=c;
	sum[c]+=a[x][y];
	L[c]=min(L[c],y);
	R[c]=max(R[c],y);
	dfs(x-1,y,c);
	dfs(x+1,y,c);
	dfs(x,y-1,c);
	dfs(x,y+1,c);
}
int dp[N][N],cost[N][N];
void rec(int l, int r, int optl, int optr, int k){
	if(l>r) return;
	int md=(l+r)/2;
	int res=0,opt=md;
	for(int i=optl;i<=min(optr,md-1);i++){//<-
		if(dp[i][k-1]+cost[i][md]>res){
			opt=i;
			res=dp[i][k-1]+cost[i][md];
		}
	}
	dp[md][k]=res;
	rec(l,md-1,optl,opt,k);
	rec(md+1,r,opt,optr,k);
}
void solve(){
	cin>>r>>s;
	for(int i=1;i<=r;i++){
		for(int j=1;j<=s;j++){
			char c;cin>>c;
			if(c=='.') a[i][j]=-1;
			else a[i][j]=(c-'0');
		}
	}
	
	int cnt=0;
	for(int i=1;i<=r;i++){
		for(int j=1;j<=s;j++) 
			if(!used[i][j] && a[i][j]!=-1){ 
				cnt++;L[cnt]=j,R[cnt]=j;
				dfs(i,j,cnt);
			}
	}
	vector<int> col(s+1);
	for(int i=1;i<=s;i++){
		map<int,int> mp;
		for(int j=1;j<=r;j++){
			if(used[j][i] && mp[used[j][i]]==0){
				mp[used[j][i]]=1;
				col[i]+=sum[used[j][i]];
			}
		}
	}
	for(int i=1;i<=s;i++){
		map<int,int> mp;
		vector<pair<int,int> > v;
		int sm=0;
		for(int j=1;j<=r;j++){
			if(used[j][i] && mp[used[j][i]]==0){
				mp[used[j][i]]=1;
				v.pb(make_pair(R[used[j][i]],sum[used[j][i]]));
				sm+=sum[used[j][i]];
			}
		}
		sort(all(v));
		int l=0;
		for(int j=i+1;j<=s;j++){
			while(l<v.size() && j>v[l].fr){
				sm-=v[l].sc;
				l++;
			}
			cost[i][j]=col[j]-sm;
		}
	}
	/*for(int i=1;i<=r;i++){
		for(int j=1;j<=s;j++) cout<<cost[i][j]<<' ';
		cout<<endl;
	}
	for(int i=1;i<=s;i++) cout<<col[i]<<' ';
	cout<<endl;*/
	for(int i=1;i<=s;i++)
		dp[i][1]=col[i];
	for(int i=2;i<=s;i++){
		rec(1,s,1,s,i);
	}
	for(int i=1;i<=s;i++){
		int ans=0;
		for(int j=1;j<=s;j++) ans=max(ans,dp[j][i]);
		cout<<ans<<endl;
	}
}
signed main(){
    int t=1;//cin>>t;
    while(t--){
		solve();
	}
}
//#endif

Compilation message

nafta.cpp: In function 'void solve()':
nafta.cpp:83:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   83 |    while(l<v.size() && j>v[l].fr){
      |          ~^~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 14940 KB Output is correct
2 Correct 2 ms 14940 KB Output is correct
3 Correct 2 ms 14940 KB Output is correct
4 Correct 2 ms 14940 KB Output is correct
5 Correct 2 ms 14940 KB Output is correct
6 Correct 2 ms 14940 KB Output is correct

Subtask #2
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 14940 KB Output is correct
2 Correct 2 ms 14940 KB Output is correct
3 Correct 2 ms 14940 KB Output is correct
4 Correct 2 ms 14940 KB Output is correct
5 Correct 2 ms 14940 KB Output is correct
6 Correct 2 ms 14940 KB Output is correct
7 Correct 10 ms 22620 KB Output is correct
8 Correct 12 ms 22516 KB Output is correct
9 Correct 13 ms 23900 KB Output is correct
10 Correct 10 ms 21852 KB Output is correct
11 Correct 10 ms 21752 KB Output is correct
12 Correct 10 ms 21852 KB Output is correct

Subtask #3
66.0 / 66.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 14940 KB Output is correct
2 Correct 2 ms 14940 KB Output is correct
3 Correct 2 ms 14940 KB Output is correct
4 Correct 2 ms 14940 KB Output is correct
5 Correct 2 ms 14940 KB Output is correct
6 Correct 2 ms 14940 KB Output is correct
7 Correct 10 ms 22620 KB Output is correct
8 Correct 12 ms 22516 KB Output is correct
9 Correct 13 ms 23900 KB Output is correct
10 Correct 10 ms 21852 KB Output is correct
11 Correct 10 ms 21752 KB Output is correct
12 Correct 10 ms 21852 KB Output is correct
13 Correct 408 ms 79024 KB Output is correct
14 Correct 478 ms 77020 KB Output is correct
15 Correct 364 ms 125008 KB Output is correct
16 Correct 409 ms 73552 KB Output is correct
17 Correct 403 ms 69460 KB Output is correct
18 Correct 414 ms 69464 KB Output is correct