// editor4
#include<stdio.h>
struct num{
    int x;
    int y;
};
int main(){
    int n;
    int total found=0;
    scanf("%d",&n);
    if(n<0){
        printf("invalid input");
        return 0;
    }
    struct num arr[n];
    for(int i=0;i<n;i++){
        scanf("%d %d",&arr[i].x,&arr[i].y);
        total+=arr[i].x + arr[i].y;
        printf("%d",total);
    }
    return 0;
    
}