제출 #297997

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
297997		Batyr	커다란 상품 (IOI17_prize)	C++17	컴파일 에러	0 ms	0 KiB

prize

#include <bits/stdc++.h>
#include "prize.h"
using namespace std;
#define pb push_back
#define ss second
#define ff first
#define pii pair<int,int>

const int maxn=2e5+5;
int dp[maxn][3],ans;
bool tr;

pii f(int l,int r){
	if(dp[l][0] == -1 and dp[l][1]==-1){
		vector<int> p = ask(l);
		dp[l][0]=p[0];
		dp[l][1]=p[1];
	}
	if(dp[l][0]+dp[l][1]==0){
		ans=l,tr=1;
		return;
	}
	if(dp[r][0]==-1 and dp[r][1]==-1){
		vector<int> p = ask(r);
		dp[r][0] = p[0];
		dp[r][1] = p[1];
	}
	
	if(dp[r][0]+dp[r][1]==0){
		ans = r,tr=1;
		return;
	}
	
	if(dp[l][0]+dp[l][1] == dp[r][0]+dp[r][1] and dp[r][0]-dp[l][0]==0) return;
	
	f(l,(l+r)/2);
	if(tr) return;	
	f((l+r)/2+1,r);
	if(tr) return;
}

int find_best(int n){
	memset(dp,-1,sizeof(dp));
	f(0,n-1);
	return ans;
}

컴파일 시 표준 에러 (stderr) 메시지

prize.cpp: In function 'std::pair<int, int> f(int, int)':
prize.cpp:21:3: error: return-statement with no value, in function returning 'std::pair<int, int>' [-fpermissive]
   21 |   return;
      |   ^~~~~~
prize.cpp:31:3: error: return-statement with no value, in function returning 'std::pair<int, int>' [-fpermissive]
   31 |   return;
      |   ^~~~~~
prize.cpp:34:70: error: return-statement with no value, in function returning 'std::pair<int, int>' [-fpermissive]
   34 |  if(dp[l][0]+dp[l][1] == dp[r][0]+dp[r][1] and dp[r][0]-dp[l][0]==0) return;
      |                                                                      ^~~~~~
prize.cpp:37:9: error: return-statement with no value, in function returning 'std::pair<int, int>' [-fpermissive]
   37 |  if(tr) return;
      |         ^~~~~~
prize.cpp:39:9: error: return-statement with no value, in function returning 'std::pair<int, int>' [-fpermissive]
   39 |  if(tr) return;
      |         ^~~~~~
prize.cpp:40:1: warning: control reaches end of non-void function [-Wreturn-type]
   40 | }
      | ^