Submission #519648

#	Time	Username	Problem	Language	Result	Execution time	Memory
519648		sofapuden	Sails (IOI07_sails)	C++14	100 / 100	72 ms	7388 KiB

sails

#include<bits/stdc++.h>

using namespace std;

int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    int n; cin >> n;
    vector<pair<int,int>> v(n);
    for(auto &x : v)cin >> x.first >> x.second;
    set<pair<int,int>> S;
    S.insert({1,1});
	S.insert({1,2});
    int cn = 3;
    sort(v.begin(),v.end());
    for(int i = 0; i < n; ++i){

        int mx = (*S.rbegin()).first;
        int am = min(v[i].first+1,mx+v[i].second)-mx;
        if(v[i].second == am){
            S.erase(prev(S.end()));
            S.insert({mx+am,cn++});
            continue;
        }
        S.insert({mx+am,cn++});

        auto it = S.lower_bound({v[i].first-v[i].second+1,0});
		if(it == S.begin())it = next(it);
        auto it2 = prev(it);

        S.insert({(*it2).first+v[i].second-(v[i].first-(*it).first+1),cn++});

		S.erase(it);
		S.erase(it2);
        S.insert({1,cn++});

    }
    vector<int> v2;
    for(auto x : S)v2.push_back(x.first);
    reverse(v2.begin(),v2.end());
    long long ans = 0;
    for(int i = 0; i < v2.size(); ++i){
        ans += 1ll * i * (v2[i]-1);
    }
    cout << ans << '\n';
}

Compilation message (stderr)

sails.cpp: In function 'int main()':
sails.cpp:42:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |     for(int i = 0; i < v2.size(); ++i){
      |                    ~~^~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 5 / 5
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10
• Subtask 11: 10 / 10