Submission #102969

#	Time	Username	Problem	Language	Result	Execution time	Memory
102969		username	The Big Prize (IOI17_prize)	C++14	20 / 100	37 ms	512 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);}

VI tt;

void dfs(int l,int r,int&res){
	if(res>=0)return;
	else if(l>=r)return;
	else{
		tt=ask(mid);
		if(tt[0]+tt[1]==0)res=mid;
		else{
			if(tt[0])dfs(l,mid,res);
			if(tt[1])dfs(mid+1,r,res);
		}
	}
}

int find_best(int n){
	int res=-1;
	dfs(0,n,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:25:10: note: in expansion of macro 'mid'
   tt=ask(mid);
          ^~~
prize.cpp:11:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define mid (l+r>>1)
              ~^~
prize.cpp:26:25: note: in expansion of macro 'mid'
   if(tt[0]+tt[1]==0)res=mid;
                         ^~~
prize.cpp:11:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define mid (l+r>>1)
              ~^~
prize.cpp:28:19: note: in expansion of macro 'mid'
    if(tt[0])dfs(l,mid,res);
                   ^~~
prize.cpp:11:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define mid (l+r>>1)
              ~^~
prize.cpp:29:17: note: in expansion of macro 'mid'
    if(tt[1])dfs(mid+1,r,res);
                 ^~~

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