Submission #532213

#	Time	Username	Problem	Language	Result	Execution time	Memory
532213		Icebear16	Fountain Parks (IOI21_parks)	C++17	5 / 100	192 ms	23420 KiB

parks

#include "parks.h"
#include <bits/stdc++.h>
int construct_roads(std::vector<int> x, std::vector<int> y) {
    if (x.size() == 1) {
	build({}, {}, {}, {});
        return 1;
    }else{
	    std::vector<int> u, v, a, b;
	    std::vector<std::pair<int,int>> A;
	    for(int i=0;i<x.size();i++){
	    	A.push_back(std::make_pair((x[i]+2*y[i]),i));
		}
		sort(A.begin(),A.end());
		int r=x.size()-1;
		int m=y[A[0].second];
		int w=y[A[r].second];
		int e=((w-m)/2)+1; 
		std::vector<int> B(e,-1);
		std::vector<int> C(e,-1);
		for(int i=0;i<x.size();i++){
			if(x[i]==2){
				B[(y[i]-m)/2]=i;
			}else{
				C[(y[i]-m)/2]=i;
			}
		}
		bool flag=true;
	    for(int i=0;i<e;i++){
	    	if(B[i]==-1 && C[i]==-1){
	    		flag=false;
	    		break;
			}
		}
		if(flag==true){
			for(int i=0;i<e;i++){
				if(B[i]>=0 && C[i]>=0){
			    	u.push_back(B[i]);
			    	v.push_back(C[i]);
				    a.push_back(3);
			    	b.push_back((i*2)+m+1);
				}
				if(B[i]>=0 && B[i+1]>=0 && (i+1)!=e){
			    	u.push_back(B[i]);
			    	v.push_back(B[i+1]);
				    a.push_back(1);
			    	b.push_back((i*2)+m+1);
				}
				if(C[i]>=0 && C[i+1]>=0 && (i+1)!=e){
			    	u.push_back(C[i]);
			    	v.push_back(C[i+1]);
				    a.push_back(5);
			    	b.push_back((i*2)+m+1);
				}
			}
		    build(u, v, a, b);
		    return 1;
		}else{
			return 0;
		}
	}
}

Compilation message (stderr)

parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:10:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |      for(int i=0;i<x.size();i++){
      |                  ~^~~~~~~~~
parks.cpp:20:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |   for(int i=0;i<x.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