Submission #1545882

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Source Code Expand

#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <vector>
#include <cstring>
#include <queue>
#include <functional>
#include <map>
#include <set>
#define SIZE 200005
#define INF 1000000000
#define PI 3.1415926535897932384626

using namespace std;
typedef long long int ll;
typedef pair <int,int> P;
typedef long double ld;

int dp[SIZE];
int n;

double solve(vector <P> vx,int x1,int x2,int y1,int y2)
{
	vector <P> vec;
	for(int i=0;i<n;i++)
	{
		int x=vx[i].first,y=vx[i].second;
		if(min(x1,x2)<=x&&x<=max(x1,x2)&&min(y1,y2)<=y&&y<=max(y1,y2))
		{
			vec.push_back(P(x,y));
		}
	}
	double ret=100.0*(ll) (abs(x1-x2)+abs(y1-y2));
	if(x1>x2)
	{
		swap(x1,x2);
		swap(y1,y2);
	}
	if(y1>y2)
	{
		for(int i=0;i<vec.size();i++) vec[i].second*=-1;
		y1*=-1,y2*=-1;
	}
	int sz=vec.size()+1;
	for(int i=0;i<sz;i++) dp[i]=INF;
	dp[0]=-INF;
	sort(vec.begin(),vec.end());
	double mn=20.0-5.0*PI;
	double add=10.0*PI-20.0;
	for(int i=0;i<vec.size();i++)
	{
		int y=vec[i].second;
		int pos=lower_bound(dp,dp+sz,y)-dp;
		dp[pos]=y;
	}
	int len=0;
	for(int i=0;i<sz;i++) if(dp[i]<INF) len=i;
	ret-=len*mn;
	if(len==min(x2-x1,y2-y1)+1) ret+=mn+add;
	return ret;
}
int main()
{
	int x1,x2,y1,y2;
	scanf("%d %d %d %d",&x1,&y1,&x2,&y2);
	scanf("%d",&n);
	vector <P> vx;
	for(int i=0;i<n;i++)
	{
		int x,y;
		scanf("%d %d",&x,&y);
		vx.push_back(P(x,y));
	}
	double ret=solve(vx,x1,x2,y1,y2);
	printf("%.12f\n",ret);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:65:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d %d %d",&x1,&y1,&x2,&y2);
                                      ^
./Main.cpp:66:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
./Main.cpp:71:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d",&x,&y);
                       ^

Judge Result