Submission #1078854

#	Time	Username	Problem	Language	Result	Execution time	Memory
1078854		mickey080929	Radio Towers (IOI22_towers)	C++17	11 / 100	4053 ms	1612 KiB

towers

#include "towers.h"
#include <bits/stdc++.h>

using namespace std;

const int inf = 2e9 + 10;

int N;
vector<int> H;

void init(int _N, vector<int> _H) {
    N = _N;
    H = _H;
}

int max_towers(int L, int R, int D) {
    vector<int> id;
    for (int i=L; i<=R; i++) {
        id.push_back(i);
    }
    sort(id.begin(), id.end(), [&] (int &u, int &v) { return H[u] > H[v]; });
    int ans = 1;
    vector<int> pos = {L-1, R+1};
    for (int i=0; i<id.size(); i++) {
        vector<int> cur = pos;
        cur.push_back(id[i]);
        sort(cur.begin(), cur.end());
        int cnt = 0;
        for (int j=0; j+1<cur.size(); j++) {
            int lh, rh;
            if (cur[j] == L-1) lh = inf;
            else lh = H[cur[j]];
            if (cur[j+1] == R+1) rh = inf;
            else rh = H[cur[j+1]];
            for (int k=cur[j]+1; k<=cur[j+1]-1; k++) {
                if (H[k] <= min(lh, rh) - D) {
                    cnt ++;
                    break;
                }
            }
        }
        if (ans <= cnt) {
            ans = cnt;
            pos = cur;
        }
    }
    return ans;
}

Compilation message (stderr)

towers.cpp: In function 'int max_towers(int, int, int)':
towers.cpp:24:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |     for (int i=0; i<id.size(); i++) {
      |                   ~^~~~~~~~~~
towers.cpp:29:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |         for (int j=0; j+1<cur.size(); j++) {
      |                       ~~~^~~~~~~~~~~

• Subtask 1: 0 / 4
• Subtask 2: 11 / 11
• Subtask 3: 0 / 12
• Subtask 4: 0 / 14
• Subtask 5: 0 / 17
• Subtask 6: 0 / 19
• Subtask 7: 0 / 23