Submission #348965

#	Time	Username	Problem	Language	Result	Execution time	Memory
348965		shrek12357	Salesman (IOI09_salesman)	C++14	19 / 100	3078 ms	26440 KiB

salesman

#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <map>
#include <set>
#include <climits>
#include <cmath>
#include <fstream>
#include <queue>
#include <stack>
#include <iomanip>
#include <bitset>
//#include "network.h"
using namespace std;
#define ll long long
//cin.tie(0);ios_base::sync_with_stdio(0);

const int MAXN = 1e5 + 5;

ll dp[MAXN];

int main() {
	//ifstream cin("bcount.in"); ofstream cout("bcount.out");
	ll n, u, d, s;
	cin >> n >> u >> d >> s;
	vector<pair<ll, pair<ll, ll>>> nums;
	for (int i = 0; i < n; i++) {
		ll t, l, x;
		cin >> t >> l >> x;
		nums.push_back({ t, {l, x} });
	}
	nums.push_back({ 0, {s, 0} });
	nums.push_back({ 1e12, {s, 0} });
	sort(nums.begin(), nums.end());
	for (int i = 0; i < nums.size(); i++) {
		dp[i] = -1e12;
	}
	dp[0] = 0;
	for (int i = 0; i < nums.size(); i++) {
		for (int j = 0; j < i; j++) {
			if (nums[j].second.first > nums[i].second.first) {
				dp[i] = max(dp[i], dp[j] + nums[i].second.second - (nums[j].second.first - nums[i].second.first) * u);
			}
			else {
				dp[i] = max(dp[i], dp[j] + nums[i].second.second - (nums[i].second.first - nums[j].second.first) * d);
			}
		}
	}
	/*int ans = 0;
	for (int i = 0; i < n; i++) {
		if (nums[i].second.first > s) {
			ans = max(ans, dp[i] - (nums[i].second.first - s) * u);
		}
		else {
			ans = max(ans, dp[i] - (s - nums[i].second.first) * d);
		}
	}*/
	cout << dp[nums.size()  - 1] << endl;
}

Compilation message (stderr)

salesman.cpp: In function 'int main()':
salesman.cpp:36:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, std::pair<long long int, long long int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |  for (int i = 0; i < nums.size(); i++) {
      |                  ~~^~~~~~~~~~~~~
salesman.cpp:40:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, std::pair<long long int, long long int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |  for (int i = 0; i < nums.size(); i++) {
      |                  ~~^~~~~~~~~~~~~

• Subtask 1: 19 / 100