提出 #76624059

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ソースコード 拡げる

#include <bits/stdc++.h>
using namespace std;
//#define int ll
//#define ll long long
#define pb emplace_back
#define pr pair<int,int>
#define mp make_pair
#define endl "\n"
inline int read()
{
	int x=0,f=1;char ch=getchar();
	while (ch<'0'||ch>'9'){if (ch=='-') f=-1;ch=getchar();}
	while (ch>='0'&&ch<='9'){x=x*10+ch-48;ch=getchar();}
	return x*f;
}
void write(int x)
{
    if(x<0)putchar('-'),x=-x;
    if(x<10)putchar(x+'0');
    else write(x/10),putchar(x%10+'0');
}
string a;
signed main(){
	cin>>a;
	for(int i=0;i<a.size();i++) if(a[i]>='0'&&a[i]<='9') cout<<a[i];
	return 0;
}

提出情報

コンパイルエラー

./Main.cpp: In function 'int main()':
./Main.cpp:25:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |         for(int i=0;i<a.size();i++) if(a[i]>='0'&&a[i]<='9') cout<<a[i];
      |                     ~^~~~~~~~~

ジャッジ結果