C语言

#include<stdio.h>

int round(int num){
    int ge=num%10;
    return (ge<5)? num-ge: num-ge+10;
}
int main(){
    int n;
    scanf("%d",&n);
    for (int i=0;i<n;i++){
        int o;
        scanf("%d",&o);
        printf("%d\n",round(o));
    }
    return 0;
}