Submission #62994864

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Source Code Expand

#include <bits/stdc++.h>
#define _F(x,y,z) for(int x=y;x<=z;x++)
#define F_(x,z,y) for(int x=z;x>=y;x--)
#define TF(x,y,z) for(int x=head[y],z;x;x=nex[x])

using namespace std;

typedef long long ll;
typedef double dou;
typedef const int ci;
typedef pair<int,int> pii;

ci maxn=2e6+10;

int n;
char s[maxn];
int main()
{
	scanf("%s",s+1);
	n=strlen(s+1);
	_F(i,1,n)
	{
		if(s[i]=='2')
			printf("%c",s[i]);
	}
	return 0;
}

Submission Info

Compile Error

Main.cpp: In function ‘int main()’:
Main.cpp:19:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   19 |         scanf("%s",s+1);
      |         ~~~~~^~~~~~~~~~

Judge Result