1649.cpp

这是哈尔滨工业大学acmOJ的源代码

/*  This Code is Submitted by wywcgs for Problem 1649 on 2005-03-27 at 16:34:35 */ 
#include <stdio.h>
#include <math.h>

int main()
{
    long term, n, a;
    
    while(scanf("%ld", &term) == 1){
        n = (1 + (long)sqrt(1+8*term)) / 2;
        while(n * n - n < 2 * term){
            n++;
        }
        n--;
        a = term - (n * n - n) / 2;
        if(n % 2 == 0){
            printf("TERM %ld IS %ld/%ld\n", term, a, (n+1-a));
        }else{
            printf("TERM %ld IS %ld/%ld\n", term, (n+1-a), a);
        }    
    }
    
    return 0;
}