#include<stdio.h>
struct Point{
    int x;
    int y;
};
int main(){
    int n;
    scanf("%d",&n);
    if(n<0){
        printf("Invalid input");
        return 0;
    }
    struct Points p[100];
    for(int i=0;i<n;i++){
        scanf("%d %d",&p[i].x&p[i].y);
    }
    ++p[0].x;
    printf("")
}