Submission #1058957

#	Time	Username	Problem	Language	Result	Execution time	Memory
1058957		qwusha	Fountain Parks (IOI21_parks)	C++17	5 / 100	34 ms	9700 KiB

parks

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define fi first
#define se second
typedef long double ld;
const ld eps = 1e-8;
mt19937 rnd(chrono::high_resolution_clock::now().time_since_epoch().count());
const ll inf = 1e18;
const ll mod = 1e9 + 7;

#include "parks.h"


int construct_roads(vector<int> x, vector<int> y) {
    bool fir = 1, sec = 1, thi = 1;
    int n = x.size();
    for (int i = 0; i < n; i++) {
        if (x[i] != 2)
            fir = 0;
    }
    if (fir) {
        vector<pair<int, int>> s(n);
        for (int i = 0; i < n; i++) {
            s[i] = {y[i], i};
        }
        sort(s.begin(), s.end());
        vector<int> u(n - 1), v(n - 1), a(n - 1, 1), b(n - 1);
        bool ok = 1;
        for (int i = 1; i < n; i++) {
            if (s[i].fi != s[i - 1].fi + 2) {
                ok = 0;
            }
            u[i - 1] = s[i - 1].se;
            v[i - 1] = s[i].se;
            b[i - 1] = s[i - 1].fi + 1;
        }
        if (!ok) {
            return 0;
        } else {
            build(u,v,a,b);
            return 1;
        }
        
    }
}



/*
int main() {
    vector<int> r = {0, 1, 1, 2, 2, 1, 2},
    u = {0, 0, 1, 1, 2, 3, 3, 4, 4, 5},
    v = {1, 2, 2, 3, 3, 4, 5, 5, 6, 6},
    c = {0, 0, 1, 0, 0, 1, 2, 0, 2, 1};

    auto res = find_reachable(r,u,v,c);
    for (int i = 0; i < r.size(); i++) {
        cout << res[i] << ' ';
    }
}
*/

Compilation message (stderr)

parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:16:19: warning: unused variable 'sec' [-Wunused-variable]
   16 |     bool fir = 1, sec = 1, thi = 1;
      |                   ^~~
parks.cpp:16:28: warning: unused variable 'thi' [-Wunused-variable]
   16 |     bool fir = 1, sec = 1, thi = 1;
      |                            ^~~
parks.cpp:46:1: warning: control reaches end of non-void function [-Wreturn-type]
   46 | }
      | ^

• Subtask 1: 5 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30