제출 #931081

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
931081		hugsfromadicto	Palindromes (info1cup18_palindromes)	C++14	100 / 100	216 ms	17820 KiB

palindromes

#pragma GCC optimize("O3")
#include <bits/stdc++.h>
#define int long long
using namespace std;
const int mxN = 1e6+1;
int a[mxN];

bool isp(int n)
{
    vector<int>v;
    while(n)
    {
        v.push_back(n%10);
        n/=10;
    }
    for(int i = 0; i < v.size(); ++i)
    {
        if(v[i] != v[v.size() - i - 1])
        {
            return false;
        }
    }
    return true;
}



void _()
{
    int n,sum = 0;
    cin >> n;
    for(int i = 0; i < n; ++i)
    {
        cin >> a[i];
        if(isp(a[i]))
            sum += a[i];
    }
    cout << sum;
}

main()
{
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);

  int tc = 1;
  //cin>>tc;
  while(tc--)
  {
      _();
  }

}

컴파일 시 표준 에러 (stderr) 메시지

palindromes.cpp: In function 'bool isp(long long int)':
palindromes.cpp:16:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     for(int i = 0; i < v.size(); ++i)
      |                    ~~^~~~~~~~~~
palindromes.cpp: At global scope:
palindromes.cpp:41:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   41 | main()
      | ^~~~

• Subtask 1: 15 / 15
• Subtask 2: 20 / 20
• Subtask 3: 30 / 30
• Subtask 4: 35 / 35