Submission #440056

#	Time	Username	Problem	Language	Result	Execution time	Memory
440056		gromperen	Unija (COCI17_unija)	C++14	60 / 100	372 ms	31464 KiB

unija

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

#define ll long long


int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);

	int n; cin >> n;
	vector<pair<int,int>> v(n), a;
	ll ans = 0;
	for (int i = 0; i < n; ++i) cin >> v[i].first >> v[i].second;
	sort(v.begin(), v.end());
	reverse(v.begin(), v.end());
	int prev = 0, prevy = 0;
	for (int i = 0; i < n; ++i) {
		if (v[i].first == prev ) continue;
		if (v[i].second <= prevy) continue;
		a.push_back(v[i]);
		prev = v[i].first;
		prevy = v[i].second;
	}
	for (int i = 0; i < a.size(); ++i) {
		ans += a[i].second * (a[i].first - ((i < a.size() - 1) ? a[i+1].first : 0));
	}
	cout << ans << "\n";


	return 0;
}

Compilation message (stderr)

unija.cpp: In function 'int main()':
unija.cpp:25:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |  for (int i = 0; i < a.size(); ++i) {
      |                  ~~^~~~~~~~~~
unija.cpp:26:42: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |   ans += a[i].second * (a[i].first - ((i < a.size() - 1) ? a[i+1].first : 0));
      |                                        ~~^~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10