Submission #103059

#	Time	Username	Problem	Language	Result	Execution time	Memory
103059		username	The Big Prize (IOI17_prize)	C++14	Compilation error	0 ms	0 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,pii ll,pii rr,int mx,int&res){
	if(res<0&&l<r){
		pii tt=qr(mid);
		if(tt.F+tt.S==0)res=i;
		else{
			if(ll!=tt)dfs(l,mid,ll,tt,mx,res);
			if(tt!=rr)dfs(mid,r,tt,rr,mx,res);
		}
	}
}

int find_best(int n){
	int res=-1,mx=0;
	REP(i,0,min(n,448)){
		pii tt=qr(i);
		mx=max(mx,tt.F+tt.S);
	}
	dfs(0,n,qr(0),pii(mx,0),mx,res);
	return res;
}

Compilation message (stderr)

prize.cpp: In function 'void dfs(int, int, pii, pii, int, int&)':
prize.cpp:11:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define mid (l+r>>1)
              ~^~
prize.cpp:30:13: note: in expansion of macro 'mid'
   pii tt=qr(mid);
             ^~~
prize.cpp:31:23: error: 'i' was not declared in this scope
   if(tt.F+tt.S==0)res=i;
                       ^
prize.cpp:11:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define mid (l+r>>1)
              ~^~
prize.cpp:33:20: note: in expansion of macro 'mid'
    if(ll!=tt)dfs(l,mid,ll,tt,mx,res);
                    ^~~
prize.cpp:11:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define mid (l+r>>1)
              ~^~
prize.cpp:34:18: note: in expansion of macro 'mid'
    if(tt!=rr)dfs(mid,r,tt,rr,mx,res);
                  ^~~