Submission #111782

#	Time	Username	Problem	Language	Result	Execution time	Memory
111782		TexTang	Two Antennas (JOI19_antennas)	C++14	2 / 100	3039 ms	2708 KiB

antennas

#include <iostream>
#include <vector>

using namespace std;
typedef long long ll;
int main () {
    int n;cin >> n;
    int height[n + 1]; bool con[n + 1][n + 1];
    for(int i = 0;i <= n;i++)
        for(int j = 0;j <= n;j++)
            con[i][j] = false;
    for(int i = 1,u,v;i <= n;i++){
        cin >> height[i] >> u >> v;
        for(int j = i + u;j <= i + v && j <= n;j++){
            con[i][j] = true;
        }
        for(int j = i - u;j >= 0 && j >= i - v;j--){
            con[i][j] = true;
        }
    }
    vector <int> sub[n + 1];
    for(int i = 1;i <= n;i++){
        for(int j = 1;j <= n;j++){
            if(con[i][j] && con[j][i]){
                sub[i].push_back(j);
            }
        }
    }
    int q; cin >> q;
    for(int p = 0;p < q;p++){
        int u,v;
        cin >> u >> v;
        int ans = -1;
        for(int i = u;i <= v;i++){
            for(int j = 0;j < sub[i].size();j++){
                if(sub[i][j] <= v && sub[i][j] >= u){
                    ans = max(ans, abs(height[i] - height[sub[i][j]]));
                }
            }
        }
        cout << ans << endl;;
    }
}

Compilation message (stderr)

antennas.cpp: In function 'int main()':
antennas.cpp:35:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int j = 0;j < sub[i].size();j++){
                           ~~^~~~~~~~~~~~~~~

• Subtask 1: 2 / 2
• Subtask 2: 0 / 11
• Subtask 3: 0 / 22
• Subtask 4: 0 / 65