#include <bits/stdc++.h> using namespace std; #define ALL(x) (x).begin(), (x).end() template<class C> void mini(C &a5, C b5) { a5 = min(a5, b5); } template<class C> void maxi(C &a5, C b5) { a5 = max(a5, b5); } #ifdef LOCAL const bool debug = true; #else const bool debug = false; #define cerr if (true) {} else cout #endif #define int long long #define double long double const int INF = 1e18; const int mod = 1e9 + 7; const int max_n = 1e6 + 100; int bar[max_n][5]; int cur[5]; int32_t main() { ios_base::sync_with_stdio(0); cin.tie(0); int n, m; cin >> n >> m; for (int i = 0; i < m; i++) { int a, b, c; cin >> a >> b >> c; bar[a][c]++; bar[b + 1][c]--; } int res = 0; for (int i = 1; i <= n; i++) { for (int j = 1; j <= 3; j++) { cur[j] += bar[i][j]; } if (cur[1] && cur[2] && cur[3] == 0) res++; } cout << res; return 0; }/* 9 5 2 8 1 4 5 2 6 7 3 5 6 2 1 2 2 */
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 | #include <bits/stdc++.h> using namespace std; #define ALL(x) (x).begin(), (x).end() template<class C> void mini(C &a5, C b5) { a5 = min(a5, b5); } template<class C> void maxi(C &a5, C b5) { a5 = max(a5, b5); } #ifdef LOCAL const bool debug = true; #else const bool debug = false; #define cerr if (true) {} else cout #endif #define int long long #define double long double const int INF = 1e18; const int mod = 1e9 + 7; const int max_n = 1e6 + 100; int bar[max_n][5]; int cur[5]; int32_t main() { ios_base::sync_with_stdio(0); cin.tie(0); int n, m; cin >> n >> m; for (int i = 0; i < m; i++) { int a, b, c; cin >> a >> b >> c; bar[a][c]++; bar[b + 1][c]--; } int res = 0; for (int i = 1; i <= n; i++) { for (int j = 1; j <= 3; j++) { cur[j] += bar[i][j]; } if (cur[1] && cur[2] && cur[3] == 0) res++; } cout << res; return 0; }/* 9 5 2 8 1 4 5 2 6 7 3 5 6 2 1 2 2 */ |