Submission #919151

#	Time	Username	Problem	Language	Result	Execution time	Memory
919151		MilosMilutinovic	산악 구조대 (JOI13_mountain)	C++14	0 / 100	5 ms	1368 KiB

mountain

#include "grader.h"
#include<bits/stdc++.h>
 
#define pb push_back
#define fi first
#define se second
#define mp make_pair
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef long double ld;
 
template <typename T> bool chkmin(T &x,T y){return x>y?x=y,1:0;}
template <typename T> bool chkmax(T &x,T y){return x<y?x=y,1:0;}
 
ll readint(){
	ll x=0,f=1; char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
	while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}
	return x*f;
}
 
int n,m,x,y,v,head;
int mat[105][105],dist[205][205];
pii que[40005];
vector<pii> c[405];
 
//int Measure(int RM, int CM){ return mat[RM][CM]; }
//void Pinpoint(int RP, int CP) { printf("%d %d\n",RP,CP); }
 
bool cmp1(pii a,pii b){ return a.fi<b.fi||(a.fi==b.fi&&a.se<b.se); }
bool cmp2(pii a,pii b){ return a.fi<b.fi||(a.fi==b.fi&&a.se>b.se); }
bool cmp3(pii a,pii b){ return a.fi>b.fi||(a.fi==b.fi&&a.se<b.se); }
bool cmp4(pii a,pii b){ return a.fi>b.fi||(a.fi==b.fi&&a.se>b.se); }
 
int getmin(int d){
	int mn=(int)1e9;
	sort(c[d].begin(),c[d].end(),cmp1);
	mn=min(mn,Measure(c[d][0].fi,c[d][0].se));
	sort(c[d].begin(),c[d].end(),cmp2);
	mn=min(mn,Measure(c[d][0].fi,c[d][0].se));
	sort(c[d].begin(),c[d].end(),cmp3);
	mn=min(mn,Measure(c[d][0].fi,c[d][0].se));
	sort(c[d].begin(),c[d].end(),cmp4);
	mn=min(mn,Measure(c[d][0].fi,c[d][0].se));
	return mn;
}
 
void Rescue(int R, int C, int MR, int MC, int X){
	n=R; m=C; x=MR; y=MC; v=X;
	for(int i=1;i<=n;i++) for(int j=1;j<=m;j++) dist[i][j]=-1;
	dist[x][y]=0;
	que[++head]=mp(x,y);
	for(int b=1;b<=head;b++){
		int i=que[b].fi,j=que[b].se;
		for(int di=-1;di<=1;di++){
			for(int dj=-1;dj<=1;dj++){
				if(abs(di)+abs(dj)!=1) continue;
				int ni=i+di,nj=j+dj;
				if(1<=ni&&ni<=n&&1<=nj&&nj<=m&&dist[ni][nj]==-1){
					dist[ni][nj]=dist[i][j]+1;
					que[++head]=mp(ni,nj);
				}
			}
		}
	}
	for(int i=1;i<=n;i++) for(int j=1;j<=m;j++) c[dist[i][j]].pb(mp(i,j));
	int mx=0;
	for(int i=1;i<=n;i++) for(int j=1;j<=m;j++) mx=max(mx,dist[i][j]);
	int l=0,r=mx,f=0;
	while(l<=r){
		int mid=(l+r)/2;
		if(getmin(mid)<=v) f=mid,r=mid-1; else l=mid+1;
	}
	for(auto&p:c[f]){
		if(Measure(p.fi,p.se)==v){
			Pinpoint(p.fi,p.se);
			return;
		}
	}
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 80