Submission #455888

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Source Code Expand

#include <cstdio>
#include <algorithm>
#include <string>
#include <set>
#include <map>
#include <iostream>
#include <sstream>
#include <cstring>
#include <cstdlib>
#include <bitset>
#include <math.h>
#include <functional>
#include <vector>
#include <queue>
#include <stack>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef unsigned int uint;
typedef pair<int,int> pii;
typedef pair<int,ll> pil;
typedef pair<ll,int> pli;
typedef pair<int,pii> pip;
typedef pair<ll,ll> pll;
typedef pair<ll,pii> plp;
#define rep(i,n) for(int i=0;i<n;i++)
#define repn(i,a,n) for(int i=a;i<n;i++)
#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define MAX(x,a) x=max(x,a)
#define MIN(x,a) x=min(x,a)

int N;
int X[20000],Y[20000];
int dp[2001][2];
int tmp[2001][2];

void dpset(int id,int x,int y,int s)
{
	if(x==X[id])MIN(dp[y][0],s);
	if(y==Y[id])MIN(dp[x][1],s);
}

int main()
{
	scanf("%d",&N);
	rep(i,N)scanf("%d%d",&X[i],&Y[i]),X[i]+=1000,Y[i]+=1000;
	rep(i,2001)dp[i][0]=dp[i][1]=tmp[i][0]=tmp[i][1]=1145141919;
	rep(i,2001)
	{
		dp[i][0]=abs(X[0]-1000)+abs(i-1000);
		dp[i][1]=abs(i-1000)+abs(Y[0]-1000);
	}
	repn(i,1,N)
	{
		rep(j,2001)tmp[j][0]=dp[j][0],tmp[j][1]=dp[j][1];
		rep(j,2001)dp[j][0]=dp[j][1]=1145141919;
		rep(j,2001)
		{
			int x=X[i-1],y=j;
			dpset(i,X[i],y,tmp[j][0]+abs(X[i]-x));
			dpset(i,x,Y[i],tmp[j][0]+abs(Y[i]-y));
			
			x=j,y=Y[i-1];
			dpset(i,X[i],y,tmp[j][1]+abs(x-X[i]));
			dpset(i,x,Y[i],tmp[j][1]+abs(y-Y[i]));
		}
	}
	int res=1145141919;
	rep(i,2001)rep(j,2)MIN(res,dp[i][j]);
	printf("%d\n",res);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:48:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
./Main.cpp:49:57: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]

Judge Result