Submission #577307

#	Time	Username	Problem	Language	Result	Execution time	Memory
577307		Mher777	Fountain (eJOI20_fountain)	C++14	30 / 100	1567 ms	3544 KiB

fountain

#include <iostream>
#include <vector>
#include <array>
#include <set>
#include <map>
#include <unordered_map>
#include <unordered_set>
#include <string>
using namespace std;

typedef int itn;
typedef long long ll;

#define MAXL 1e18 + 9
#define MAX 1e9 + 9
#define ff first
#define ss second
#define pii pair<int,int>
#define pll pair<ll,ll>
#define mii map<int,int>
#define mll map<ll,ll>
#define vi vector<int>
#define vll vector<ll>
#define pub push_back
#define puf push_front
#define pob pop_back
#define pof pop_front

// 30 points

const int N = 1e5 + 10;
int go[N], pref[N];

void solve() {
	int n, q;
	ll n1, n2;
	cin >> n >> q;
	vector<pair<int, pll>> v;
	for (int i = 0; i < n; i++) {
		cin >> n1 >> n2;
		v.pub({ i + 1, { n1, n2 } });
	}
	v.pub({ 0, { MAXL, MAXL } });
	ll sum;
	if (true) {
		for (int i = 0; i < v.size(); i++) {
			for (int j = i + 1; j < v.size(); j++) {
				if (v[j].ss.ff > v[i].ss.ff) {
					go[v[i].ff] = v[j].ff;
					break;
				}
			}
		}
		while (q--) {
			cin >> n1 >> n2;
			sum = 0;
			while (sum < n2) {
				if (sum + v[n1 - 1].ss.ss >= n2) {
					cout << n1 << '\n';
					break;
				}
				else {
					sum += v[n1 - 1].ss.ss;
					n1 = go[n1];
					if (n1 == 0) {
						cout << n1 << '\n';
						break;
					}
				}
			}
		}
	}
	else {

	}
}

int main() {
	solve();
	return 0;
}

Compilation message (stderr)

fountain.cpp: In function 'void solve()':
fountain.cpp:46:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, std::pair<long long int, long long int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |   for (int i = 0; i < v.size(); i++) {
      |                   ~~^~~~~~~~~~
fountain.cpp:47:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, std::pair<long long int, long long int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |    for (int j = i + 1; j < v.size(); j++) {
      |                        ~~^~~~~~~~~~

• Subtask 1: 30 / 30
• Subtask 2: 0 / 30
• Subtask 3: 0 / 40