Submission #730044

#	Time	Username	Problem	Language	Result	Execution time	Memory
730044		t6twotwo	모임들 (IOI18_meetings)	C++17	19 / 100	473 ms	196500 KiB

meetings

#include "meetings.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const ll inf = 1E18;
vector<ll> minimum_costs(vector<int> H, vector<int> L, vector<int> R) {
    int N = H.size();
    int Q = L.size();
    if (N <= 5000 && Q <= 5000) {
        vector pfs(N, vector<ll>(N + 1));
        for (int i = 0; i < N; i++) {
            vector<int> mx(N);
            mx[i] = H[i];
            for (int j = i - 1; j >= 0; j--) {
                mx[j] = max(mx[j + 1], H[j]);
            }
            for (int j = i + 1; j < N; j++) {
                mx[j] = max(mx[j - 1], H[j]);
            }
            for (int j = 0; j < N; j++) {
                pfs[i][j + 1] = pfs[i][j] + mx[j];
            }
        }
        vector<ll> ans(Q, inf);
        for (int i = 0; i < Q; i++) {
            for (int j = L[i]; j <= R[i]; j++) {
                ans[i] = min(ans[i], pfs[j][R[i] + 1] - pfs[j][L[i]]);
            }
        }
        return ans;
    } else {
        vector<int> two;
        for (int i = 0; i < N; i++) {
            if (H[i] == 2) {
                two.push_back(i);
            }
        }
        vector<ll> ans(Q, inf);
        for (int i = 0; i < Q; i++) {
            int x = lower_bound(two.begin(), two.end(), L[i]) - two.begin();
            int y = upper_bound(two.begin(), two.end(), R[i]) - two.begin() - 1;
            if (x == two.size() || two[x] > R[i]) {
                ans[i] = R[i] - L[i] + 1;
            } else {
                ans[i] = R[i] - L[i] + 1 + two[y] - two[x] + 1;
            }
        }
        return ans;
    }
}

Compilation message (stderr)

meetings.cpp: In function 'std::vector<long long int> minimum_costs(std::vector<int>, std::vector<int>, std::vector<int>)':
meetings.cpp:42:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |             if (x == two.size() || two[x] > R[i]) {
      |                 ~~^~~~~~~~~~~~~

• Subtask 1: 4 / 4
• Subtask 2: 15 / 15
• Subtask 3: 0 / 17
• Subtask 4: 0 / 24
• Subtask 5: 0 / 40