1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
#include<bits/stdc++.h>
using namespace std;
using pii = pair<int, int>;
using pll = pair<long long, long long>;
using pil = pair<int, long long>;
using pli = pair<long long, int>;
using ll = long long;
#define X first
#define Y second
#define pb push_back
#define mp make_pair

int n,m,k,l,r,t[2200007],rozm_t,wyn;

void akt(int L, int R, int W){
if(L<=R && l<=L && R<=r){
    if(k==1){
        if(t[W]%2==0) t[W]++;
    }
    else if(k==2){
        if(t[W]%4<2) t[W]=t[W]+2;
    }
    else{
        if(t[W]<4) t[W]=t[W]+4;
    }
    return;
}
if(W>=rozm_t) return;
int len = R-L+1;
if(R-len/2>=l) akt(L,R-len/2,2*W);
if(L+len/2<=r) akt(L+len/2,R,2*W+1);
return;
}

void wynik(int W, bool K1, bool K2, bool K3){

if(K1 && t[W]%2==0) t[W]++;
if(K2 && t[W]%4<2) t[W]=t[W]+2;
if(K3 && t[W]<4) t[W]=t[W]+4;
if(W>=rozm_t) {
        if(t[W]==3) wyn++;
        return;
        }
bool k1=false,k2=false,k3=false;
if(t[W]%2==1) k1=true;
if(t[W]%4==2 || t[W]%4==3) k2=true;
if(t[W]>3) k3=true;
wynik(2*W,k1,k2,k3);
wynik(2*W+1,k1,k2,k3);
return;
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin >> n >> m;
    rozm_t = 1;
    while(n>rozm_t-3) rozm_t=rozm_t*2;

    while(m--){
        cin >> l >> r >> k;
        akt(1,rozm_t,1);
    }
    wynik(1,false,false,false);

cout << wyn;
    return 0;
}