제출 #1286509

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1286509		ggillianjiang	코끼리 (Dancing Elephants) (IOI11_elephants)	C++20	컴파일 에러	0 ms	0 KiB

elephants

#include <iostream>
#include <cstdio>
#include <vector>
#include <utility>

using namespace std;

#define loop(s) for (int a = 0; a < s; ++a)
using vec_t = vector<int>;
using p_t = pair<int, pair<int, int>>;
using vp_t = vector<p_t>;
using vv_t = vector<vector<int>>;
int n, l, least;
vv_t frames;

int update(int i, int y)
{
    int si = frames[i / l].size();
    loop(frames[i / l].size())
    {
        int b = frames[i / l][a];
        if (b == -1)
            continue;
        else if (b == i){
            if(a == si - 1)
                frames[i / l].pop_back();
            else 
                b = -1;

            if(si==1) least --;
            break;
        }
    }

    int sy = frames[y / l].size();

    if (sy == 0)
        least++;
    
    frames[y / l].push_back(y);

    printf("%d", least);

    return least;
}

void init(int N, int L, int X[])
{

    int M, i, y;
    n = N;
    l = L;

    scanf("%d", &M);

    loop(sizeof(*X) / sizeof(X[0]))
    {
        frames[X[a] / l].push_back(X[a]);
        if (X[a] / l != X[a - 1] / l)
            least++;
    }

    printf("%d", least);

    loop(M)
    {
        scanf("%d %d", &i, &y);
        update(i, y);
    }
}

int main()
{

    int i, n, l;

    scanf("%d %d", &n, &l);

    int X[n];

    loop(n)
    {
        scanf("%d", &X[a]);
    }

    init(n, l, X);

    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

elephants.cpp: In function 'void init(int, int, int*)':
elephants.cpp:54:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   54 |     scanf("%d", &M);
      |     ~~~~~^~~~~~~~~~
elephants.cpp:67:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   67 |         scanf("%d %d", &i, &y);
      |         ~~~~~^~~~~~~~~~~~~~~~~
elephants.cpp: In function 'int main()':
elephants.cpp:77:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   77 |     scanf("%d %d", &n, &l);
      |     ~~~~~^~~~~~~~~~~~~~~~~
elephants.cpp:83:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   83 |         scanf("%d", &X[a]);
      |         ~~~~~^~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccjDtWHO.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccCBIjVb.o:elephants.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status