Submission #1059527

#	Time	Username	Problem	Language	Result	Execution time	Memory
1059527		pcc	Fountain Parks (IOI21_parks)	C++17	5 / 100	38 ms	9384 KiB

parks

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

#define pii pair<int,int>
#define fs first
#define sc second

int N;

int construct_roads(std::vector<int> x, std::vector<int> y) {
    if (x.size() == 1) {
		build({}, {}, {}, {});
        return 1;
    }
	N = x.size();
	vector<pii> v;
	for(int i = 0;i<N;i++)v.push_back(pii(x[i],y[i]));
	vector<int> perm(N);iota(perm.begin(),perm.end(),0);
	sort(perm.begin(),perm.end(),[&](int a,int b){return y[a]<y[b];});
	for(int i = 1;i<perm.size();i++){
		int now = perm[i],pre = perm[i-1];
		if(y[pre]+2 != y[now])return 0;
	}
	vector<int> ans[4];
	for(int i = 1;i<perm.size();i++){
		int pre = perm[i-1],now = perm[i];
		ans[0].push_back(pre);
		ans[1].push_back(now);
		ans[2].push_back(3);
		ans[3].push_back((y[now]+y[pre])>>1);
	}
	build(ans[0],ans[1],ans[2],ans[3]);
	return 1;
}

Compilation message (stderr)

parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:21:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |  for(int i = 1;i<perm.size();i++){
      |                ~^~~~~~~~~~~~
parks.cpp:26:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |  for(int i = 1;i<perm.size();i++){
      |                ~^~~~~~~~~~~~

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