Submission #532418

#	Time	Username	Problem	Language	Result	Execution time	Memory
532418		Icebear16	Fountain Parks (IOI21_parks)	C++17	0 / 100	1 ms	332 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;
//		}
//	}
//}
////4
////2 0
////2 2
////2 4
////2 6
//
////8
////4 8
////4 10
////2 6
////2 10
////2 4
////2 8
////4 4
////4 2



#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){
			if(B[0]>=0 && C[0]>=0){
		    	u.push_back(B[0]);
		    	v.push_back(C[0]);
			    a.push_back(3);
		    	b.push_back(m+1);
			}
			for(int i=1;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){
			    	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){
			    	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;
		}
	}
}
//4
//2 0
//2 2
//2 4
//2 6

//8
//4 8
//4 10
//2 6
//2 10
//2 4
//2 8
//4 4
//4 2

Compilation message (stderr)

parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:89:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |      for(int i=0;i<x.size();i++){
      |                  ~^~~~~~~~~
parks.cpp:99:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   99 |   for(int i=0;i<x.size();i++){
      |               ~^~~~~~~~~

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