#include <stdio.h>

int stack[100];
int top = -1;

void push(int x){
    stack[++top] = x;
}

void pop(){
   top--;
}

int main(){

    int arr[] = {100, 110, 90, 120};
    int count = 0;

    for(int i = 0; i < 3; i++){
        if(arr[i] > stack[top]){
            count++;
            break;
        }
        push(i);
    }
    printf("%d일 뒤", count);
    return 0;
}