Submission #1011367

#	Time	Username	Problem	Language	Result	Execution time	Memory
1011367		pcc	Toilets (JOI16_toilets)	C++17	100 / 100	21 ms	6860 KiB

toilets

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define fs first
#define sc second

ll N,M;
vector<pair<string,ll>> v;

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);cout.tie(0);
	cin>>N>>M;
	ll sum = 0,ans = 0;
	for(ll i = 0;i<M;i++){
		string s;
		ll t;
		cin>>s>>t;
		reverse(s.begin(),s.end());
		v.push_back(make_pair(s,t));
	}
	reverse(v.begin(),v.end());
	for(auto [s,t] : v){
		ll ts = 0,tbig = -1e18;
		for(auto &i:s){
			if(i == 'F'){
				ts--;
				tbig = max(tbig,ts);
			}
			else ts++;
		}
		ans = max(ans,sum+tbig);
		sum += ts*(t-1);
		ans = max(ans,sum+tbig);
		sum += ts;
	}
	if(sum>0)cout<<"-1\n";
	else cout<<ans<<'\n';
	return 0;
}

• Subtask 1: 14 / 14
• Subtask 2: 22 / 22
• Subtask 3: 64 / 64