#include<stdio.h> #include<string.h> char s[1000006]; int a[1000006]; int main() {

scanf("%s", s);
int n = strlen(s);
for (int k = 0; k < n; k++) {
	a[k + 1] = s[k] - '0';
}
a[n] = a[n] + 2;
for (int p = n; p >= 1; p--) {
	if (a[p] >= 10) {
		a[p] = a[p] % 10;
		a[p - 1] ++;
	} 
}
if (a[0] == 0) {
	for (int k = 1; k <= n; k++) {
		printf("%d", a[k]);
	}
}
if (a[0] == 1) {
	for (int k = 0; k <= n; k++) {
		printf("%d", a[k]);
	}
}

}