Submission

Score: 100

User: Ratthathammanoon

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.003 second

Submitted On: 2025-10-12 23:19:14

#include <stdio.h>
#include <string.h>

void sort(char *P){
	char temp;
	
	for(int i=0;i<strlen(P);i++){
		for(int j=0;j<strlen(P);j++){
			if(P[i]<P[j]){
				temp = P[i];
				P[i] = P[j];
				P[j] = temp;

			}
		}
	}
}

int main(){
	char A[20],F[20];
	int found=0,k=0;
	
	scanf("%s",A);
	
	for(int i=0;i<strlen(A);i++){
		found = 0;
		for(int j=0;j<strlen(A);j++){
			if(i==j){
				continue;
			}
			if(A[i]==A[j]){
				found=1;
			}
		}
		if(found==0){
				F[k++]=A[i];
			}
	}
	F[k] = '\0';
	sort(F);
	
	printf("%c",F[0]);
}