[백준] 13304번 : 방 배정 - C

https://www.acmicpc.net/problem/13304

#include<stdio.h>
static int num(int sum,int k){
        int room=sum%k;
        int c=0;
        if(room==0) c=sum/k;
        else c=(sum/k)+1;
        return c;
    }
int main() {
    int n,k;
    scanf("%d %d",&n,&k);
    int boy[6]={};
    int girl[6]={};
    int count=0;
    for(int i=0;i<n;i++){
        int e,y;
        scanf("%d %d",&e,&y);
        if(e==0) girl[y-1]++;
        else boy[y-1]++;
    }
    int sum=0;
    for(int i=0;i<6;i+=2){
        if(i==0){
            sum=boy[i]+boy[i+1]+girl[i]+girl[i+1];
            count+=num(sum,k);
        } 
        else{
            sum=boy[i]+boy[i+1];
            count+=num(sum,k);
            sum=girl[i]+girl[i+1];
            count+=num(sum,k);
        }
    }
    printf("%d",count);
}