Submission #3415997

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
namespace IO
{
	const int __S=(1<<20)+5;char __buf[__S],*__H,*__T;
	inline char getc()
	{
		if(__H==__T) __T=(__H=__buf)+fread(__buf,1,__S,stdin);
		if(__H==__T) return -1;return *__H++;
	}
	template <class __I>inline void read(__I &__x)
	{
		__x=0;int __fg=1;char __c=getc();
		while(!isdigit(__c)&&__c!='-') __c=getc();
		if(__c=='-') __fg=-1,__c=getc();
		while(isdigit(__c)) __x=__x*10+__c-'0',__c=getc();
		__x*=__fg;
	}
	inline void readd(double &__x)
	{
		__x=0;double __fg=1.0;char __c=getc();
		while(!isdigit(__c)&&__c!='-') __c=getc();
		if(__c=='-') __fg=-1.0,__c=getc();
		while(isdigit(__c)) __x=__x*10.0+__c-'0',__c=getc();
		if(__c!='.'){__x=__x*__fg;return;}else while(!isdigit(__c)) __c=getc();
		double __t=1e-1;while(isdigit(__c)) __x=__x+1.0*(__c-'0')*__t,__t=__t*0.1,__c=getc();
		__x=__x*__fg;
	}
	inline void reads(char *__s,int __x)
	{
		char __c=getc();int __tot=__x-1;
		while(__c<'!'||__c>'~') __c=getc();
		while(__c>='!'&&__c<='~') __s[++__tot]=__c,__c=getc();
		__s[++__tot]='\0';
	}
	char __obuf[__S],*__oS=__obuf,*__oT=__oS+__S-1,__c,__qu[55];int __qr;
	inline void flush(){fwrite(__obuf,1,__oS-__obuf,stdout);__oS=__obuf;}
	inline void putc(char __x){*__oS++ =__x;if(__oS==__oT) flush();}
	template <class __I>inline void print(__I __x)
	{
		if(!__x) putc('0');
		if(__x<0) putc('-'),__x=-__x;
		while(__x) __qu[++__qr]=__x%10+'0',__x/=10;
		while(__qr) putc(__qu[__qr--]);
	}
	inline void prints(const char *__s,const int __x)
	{
		int __len=strlen(__s+__x);
		for(int __i=__x;__i<__len+__x;__i++) putc(__s[__i]);
	}
	inline void printd(double __x,int __d)
	{
		long long __t=(long long)floor(__x);print(__t);putc('.');__x-=(double)__t;
		while(__d--)
		{
			double __y=__x*10.0;__x*=10.0;
			int __c=(int)floor(__y);
			putc(__c+'0');__x-=floor(__y);
		}
	}
	inline void el(){putc('\n');}inline void sp(){putc(' ');}
}using namespace IO;
struct nod{int x,y,z,c,v;}p[400005];char o[5][10];
int n,m,K,tot,A1,A2,B1,B2,x[400005],y[400005],z[400005],c[400005],vis[400005],a[400005],las[400005],s[400005],v[400005];
inline bool cmp(nod a,nod b)
{
	if(a.c!=b.c) return a.c<b.c;
	if(a.c==b.c&&a.c==1) return a.y<b.y;if(a.c==b.c&&a.c==2) return a.x<b.x;
	if(a.c==b.c&&a.c==3) return a.y>b.y;if(a.c==b.c&&a.c==4) return a.x>b.x;
}
int main()
{
	scanf("%d%d%d",&n,&m,&K);
	for(int i=1;i<=K;i++)
	{
		scanf("%d%d%d%d",&A1,&B1,&A2,&B2);
		if(((A1==0||A1==n)||(B1==0||B1==m))&&((A2==0||A2==n)||(B2==0||B2==m))) 
			x[++tot]=A1,y[tot]=B1,z[tot]=1,v[tot]=i,x[++tot]=A2,y[tot]=B2,z[tot]=-1,v[tot]=i;
	}
	for(int i=1;i<=tot;i++)
	{
		if(x[i]==0&&y[i]>0) c[i]=1;if(x[i]>0&&y[i]==m) c[i]=2;
		if(x[i]==n&&y[i]<m) c[i]=3;if(x[i]<n&&y[i]==0) c[i]=4;
	}
	for(int i=1;i<=tot;i++) p[i]=(nod){x[i],y[i],z[i],c[i],v[i]};
	sort(p+1,p+tot+1,cmp);for(int i=1;i<=tot;i++) a[i]=p[i].v;
	for(int i=tot;i;i--) if(!vis[a[i]]) vis[a[i]]=i,las[i]=tot+1;else las[i]=vis[a[i]];
	for(int i=1;i<=tot;i++) if(las[i]!=tot+1) s[i]++,s[las[i]]--;
	for(int i=1;i<=tot;i++) s[i]+=s[i-1];
	for(int i=1;i<=tot;i++) if(las[i]!=tot+1&&s[las[i]]-s[i-1]!=0){puts("NO");goto gg;}
	puts("YES");gg:;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:73:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d",&n,&m,&K);
                          ^
./Main.cpp:76:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d%d",&A1,&B1,&A2,&B2);
                                    ^

Judge Result