Problem:
Score : 200 points

Problem Statement

Snuke has come to a store that sells boxes containing balls. The store sells the following three kinds of boxes:

Red boxes, each containing R red balls

Green boxes, each containing G green balls

Blue boxes, each containing B blue balls

Snuke wants to get a total of exactly N balls by buying r red boxes, g green boxes and b blue boxes.
How many triples of non-negative integers (r,g,b) achieve this?

Constraints

All values in input are integers.

1 \leq R,G,B,N \leq 3000

Input

Input is given from Standard Input in the following format:

R G B N

Output

Print the answer.

Sample Input 1

1 2 3 4

Sample Output 1

4

Four triples achieve the objective, as follows:

(4,0,0)

(2,1,0)

(1,0,1)

(0,2,0)

Sample Input 2

13 1 4 3000

Sample Output 2

87058

Solution in C (GCC 5.4.1) (judge verdict: Wrong Answer)

#include <stdio.h>
int min(int,int);

int main(){
    int r,g,b;
    int R,G,B,N;
    int count=0;
    scanf("%d",&R);
    scanf("%d",&G);
    scanf("%d",&B);
    scanf("%d",&N);

    for(r=0;r<=min(N,R);r++){
        for(g=0;g<=min(N-r,G);g++){
            if(N-r-g<=B){
                count++;
            }
        }
    }
    printf("%d",count);
    return 0;
}

int min(int a,int b){
    int m;
    if(a>b){
        m=b;
    }else{
        m=a;
    }
    return b;
}