2983Magic-Pen3

//代码含全角空格

#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
const int N=10005;
int a[N],b[N],n,m,x,y;

int main(){
    while(scanf("%d%d",&n,&m)==2){
        memset(a,0,sizeof(a));
        memset(b,0,sizeof(b));
        while(m--){
            scanf("%d%d",&x,&y);
            if(x>y){
                int tmp=x;
                x=y;
                y=tmp;
            }
            b[x]++;b[y+1]--;
        }
        int ans[3]={0,0,0};
        for(int i=1;i<=n;i++){
            a[i]=a[i-1]+b[i];
            if(a[i]%3==0){
                ans[0]++;
            }
            else if(a[i]%3==1){          
                ans[1]++;
            }
            else{
                ans[2]++;
            }
        }
        printf("%d %d %d\n",ans[0],ans[1],ans[2]);
    }
    return 0;
}