Submission #418468

#	Time	Username	Problem	Language	Result	Execution time	Memory
418468		_Avocado_	Art Exhibition (JOI18_art)	C++14	100 / 100	238 ms	22488 KiB

art

    #include <bits/stdc++.h>
    #include <iostream>
    using namespace std;
    #define int int64_t
     
    signed main(){
    	ios_base::sync_with_stdio(false);
    	cin.tie(NULL);
    	int n; cin>>n;
    	
    	vector<pair<int, int>>v;
    	
    	for(int i = 0; i<n; ++i){
    		int a, b; cin>>a>>b;
    		v.push_back({a, b});
    	}
    	
    	sort(v.begin(), v.end());
    	
    	vector<int>prefix(n);
    	
    	prefix[0] = v[0].second;
    	
    	for(int i = 1; i<n; ++i) prefix[i] = prefix[i-1] + v[i].second;
    	
    	vector<int>ans(n);
    	
    	for(int i = 1; i<n; ++i){
    		int cur = prefix[i] - (v[i].first - v[0].first);
    		ans[i] = cur;
  
    	}
    	
    	vector<int>suffix(n);
    	
    	suffix[n-1] = ans[n-1];
    	
    	for(int i = n-2; i>=0; --i){
			suffix[i] = max(suffix[i+1], ans[i]);
		}
		/*
		for(auto u: suffix) cout<<u<<" ";
		cout<<endl;
		*/
		
		int out = suffix[0];
    	
    	for(int i = 1; i<n-1; ++i){
    		int diff = (v[i].first - v[0].first) - prefix[i-1];
    		out = max(out, suffix[i] + diff);
    		//if(diff > 0) ans += diff;
    	}
    	
    	for(int i = 0; i<n; ++i) out = max(out, v[i].second);
    	
    	cout<<out;
    	
    	
    	cout<<'\n';
    }

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 50 / 50