Submission #1075375

#	Time	Username	Problem	Language	Result	Execution time	Memory
1075375		HappyCapybara	Circle selection (APIO18_circle_selection)	C++17	7 / 100	3078 ms	26928 KiB

circle_selection

#include<bits/stdc++.h>
using namespace std;

double eps = pow(10, -9);

double dist(int ax, int ay, int bx, int by){
    return sqrt(pow(ax-bx, 2)+pow(ay-by, 2));
}

int main(){
    int n;
    cin >> n;
    vector<vector<int>> v(n);
    for (int i=0; i<n; i++){
        int x, y, r;
        cin >> x >> y >> r;
        v[i] = {-r, i, x, y};
    }
    sort(v.begin(), v.end());
    int x = 0;
    vector<int> done(n, 0);
    while (x != n){
        //cout << x << "\n";
        int cur;
        for (int i=0; i<n; i++){
            if (!done[v[i][1]]){
                cur = i;
                break;
            }
        }
        /*cout << cur << "!\n";
        cout << done[v[cur][1]] << "\n";*/
        for (int i=0; i<n; i++){
            //cout << i << " " << dist(v[cur][2], v[cur][3], v[i][2], v[i][3]) << "\n";
            if (!done[v[i][1]] && dist(v[cur][2], v[cur][3], v[i][2], v[i][3]) < eps+(double) (0-(v[cur][0]+v[i][0]))){
                //cout << i << "\n";
                done[v[i][1]] = v[cur][1]+1;
                x++;
            }
        }
    }
    for (int i=0; i<n; i++) cout << done[i] << "\n";
}

Compilation message (stderr)

circle_selection.cpp: In function 'int main()':
circle_selection.cpp:35:56: warning: 'cur' may be used uninitialized in this function [-Wmaybe-uninitialized]
   35 |             if (!done[v[i][1]] && dist(v[cur][2], v[cur][3], v[i][2], v[i][3]) < eps+(double) (0-(v[cur][0]+v[i][0]))){
      |                                                        ^

• Subtask 1: 7 / 7
• Subtask 2: 0 / 12
• Subtask 3: 0 / 15
• Subtask 4: 0 / 23
• Subtask 5: 0 / 30
• Subtask 6: 0 / 13