제출 #1073702

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1073702		Dan4Life	친구 (IOI14_friend)	C++17	컴파일 에러	0 ms	0 KiB

friend

#include "friend.h"
#include <algorithm>
int findSample(int n, int c[], int h[], int p[]){
    int ans = 0, i; // Mind-blown!
    for(int i = n; i>0; i--){
        if(p[i]==2) c[h[i]]=max(c[h[i]],c[i]);
        else if(p[i]==1) c[h[i]]+=c[i];
        else ans+=c[i], c[h[i]]=max(0, c[h[i]]-c[i]);
    }
    return c[0]+ans;
}

컴파일 시 표준 에러 (stderr) 메시지

friend.cpp: In function 'int findSample(int, int*, int*, int*)':
friend.cpp:6:29: error: 'max' was not declared in this scope; did you mean 'std::max'?
    6 |         if(p[i]==2) c[h[i]]=max(c[h[i]],c[i]);
      |                             ^~~
      |                             std::max
In file included from /usr/include/c++/10/algorithm:62,
                 from friend.cpp:2:
/usr/include/c++/10/bits/stl_algo.h:3486:5: note: 'std::max' declared here
 3486 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
friend.cpp:8:33: error: 'max' was not declared in this scope; did you mean 'std::max'?
    8 |         else ans+=c[i], c[h[i]]=max(0, c[h[i]]-c[i]);
      |                                 ^~~
      |                                 std::max
In file included from /usr/include/c++/10/algorithm:62,
                 from friend.cpp:2:
/usr/include/c++/10/bits/stl_algo.h:3486:5: note: 'std::max' declared here
 3486 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
friend.cpp:4:18: warning: unused variable 'i' [-Wunused-variable]
    4 |     int ans = 0, i; // Mind-blown!
      |                  ^