제출 #342465

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
342465		urd05	Spring cleaning (CEOI20_cleaning)	C++14	9 / 100	31 ms	748 KiB

cleaning

#include <bits/stdc++.h>
using namespace std;

int used[100000];

int main(void) {
    int n;
    scanf("%d",&n);
    int q;
    scanf("%d",&q);
    for(int i=1;i<n;i++) {
        int u,v;
        scanf("%d %d",&u,&v);
    }
    int x;
    scanf("%d",&x);
    int l=n-1;
    int ret=0;
    for(int i=0;i<x;i++) {
        int v;
        scanf("%d",&v);
        v--;
        if (used[v]) {
            l++;
        }
        used[v]++;
    }
    for(int i=1;i<n;i++) {
        if (used[i]%2==0&&used[i]>0) {
            ret++;
        }
    }
    printf("%d",(l%2==0?n-1+x+ret:-1));
}

컴파일 시 표준 에러 (stderr) 메시지

cleaning.cpp: In function 'int main()':
cleaning.cpp:8:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    8 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
cleaning.cpp:10:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   10 |     scanf("%d",&q);
      |     ~~~~~^~~~~~~~~
cleaning.cpp:13:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   13 |         scanf("%d %d",&u,&v);
      |         ~~~~~^~~~~~~~~~~~~~~
cleaning.cpp:16:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   16 |     scanf("%d",&x);
      |     ~~~~~^~~~~~~~~
cleaning.cpp:21:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   21 |         scanf("%d",&v);
      |         ~~~~~^~~~~~~~~

• Subtask 1: 0 / 0
• Subtask 2: 9 / 9
• Subtask 3: 0 / 9
• Subtask 4: 0 / 16
• Subtask 5: 0 / 19
• Subtask 6: 0 / 17
• Subtask 7: 0 / 30