Submission #103085

#	Time	Username	Problem	Language	Result	Execution time	Memory
103085		username	The Big Prize (IOI17_prize)	C++14	90 / 100	83 ms	972 KiB

prize

#include<bits/stdc++.h>
#include "prize.h"
using namespace std;
typedef pair<int,int> pii;
typedef vector<int> VI;
#define REP(i,j,k) for(register int i=(j);i<(k);++i)
#define RREP(i,j,k) for(register int i=(j)-1;i>=(k);--i)
#define ALL(a) a.begin(),a.end()
#define MST(a,v) memset(a,(v),sizeof a)
#define pb push_back
#define mid (l+r>>1)
#define lch (idx*2+1)
#define rch (idx*2+2)
#define F first
#define S second
#define de(...) cerr<<__VA_ARGS__
#define ar(a,s,t) {REP(__i,s,t)de(a[__i]<<' ');de(endl);}

map<int,pii>mp;
pii qr(int i){
	if(mp.count(i))return mp[i];
	else{
		VI tt=ask(i);
		return mp[i]=pii(tt[0],tt[1]);
	}
}

void dfs(int l,int r,int&res){
	if(res>=0)return;
//	else if(l!=r&&qr(l)==qr(r))return;
	else{
		if(qr(mid).F+qr(mid).S==0)res=mid;
		if(l!=mid&&qr(l)!=qr(mid))dfs(l,mid-1,res);
		if(mid!=r&&qr(mid)!=qr(r))dfs(mid+1,r,res);
	}
}

int find_best(int n){
	int res=-1;
	dfs(0,n-1,res);
	return res;
}

Compilation message (stderr)

prize.cpp: In function 'void dfs(int, int, int&)':
prize.cpp:11:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define mid (l+r>>1)
              ~^~
prize.cpp:32:9: note: in expansion of macro 'mid'
   if(qr(mid).F+qr(mid).S==0)res=mid;
         ^~~
prize.cpp:11:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define mid (l+r>>1)
              ~^~
prize.cpp:32:19: note: in expansion of macro 'mid'
   if(qr(mid).F+qr(mid).S==0)res=mid;
                   ^~~
prize.cpp:11:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define mid (l+r>>1)
              ~^~
prize.cpp:32:33: note: in expansion of macro 'mid'
   if(qr(mid).F+qr(mid).S==0)res=mid;
                                 ^~~
prize.cpp:11:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define mid (l+r>>1)
              ~^~
prize.cpp:33:9: note: in expansion of macro 'mid'
   if(l!=mid&&qr(l)!=qr(mid))dfs(l,mid-1,res);
         ^~~
prize.cpp:11:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define mid (l+r>>1)
              ~^~
prize.cpp:33:24: note: in expansion of macro 'mid'
   if(l!=mid&&qr(l)!=qr(mid))dfs(l,mid-1,res);
                        ^~~
prize.cpp:11:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define mid (l+r>>1)
              ~^~
prize.cpp:33:35: note: in expansion of macro 'mid'
   if(l!=mid&&qr(l)!=qr(mid))dfs(l,mid-1,res);
                                   ^~~
prize.cpp:11:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define mid (l+r>>1)
              ~^~
prize.cpp:34:6: note: in expansion of macro 'mid'
   if(mid!=r&&qr(mid)!=qr(r))dfs(mid+1,r,res);
      ^~~
prize.cpp:11:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define mid (l+r>>1)
              ~^~
prize.cpp:34:17: note: in expansion of macro 'mid'
   if(mid!=r&&qr(mid)!=qr(r))dfs(mid+1,r,res);
                 ^~~
prize.cpp:11:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define mid (l+r>>1)
              ~^~
prize.cpp:34:33: note: in expansion of macro 'mid'
   if(mid!=r&&qr(mid)!=qr(r))dfs(mid+1,r,res);
                                 ^~~

• Subtask 1: 20 / 20
• Subtask 2: 70 / 80