#include <bits/stdc++.h> #include <math.h> using namespace std; #define endl "\n" #define mp make_pair #define st first #define nd second #define pii pair<int, int> #define pb push_back #define _upgrade ios_base::sync_with_stdio(0), cout.setf(ios::fixed), cout.precision(10), cin.tie(0), cout.tie(0); #define REP(i, n) for (int i = 0; i < (n); ++i) #define FWD(i, a, b) for (int i = (a); i < (b); ++i) #define rep(i, n) for (int i = 0; i < (n); ++i) #define fwd(i, a, b) for (int i = (a); i < (b); ++i) #define all(c) (c).begin(), (c).end() #define sz(X) (int)((X).size()) #define what(x) cerr << #x << " is " << x << endl; ostream &operator<<(ostream &out, string str) { for (char c : str) out << c; return out; } template <class L, class R> ostream &operator<<(ostream &out, pair<L, R> p) { return out << "(" << p.st << ", " << p.nd << ")"; } template <class T> auto operator<<(ostream &out, T a) -> decltype(a.begin(), out) { out << '{'; for (auto it = a.begin(); it != a.end(); it = next(it)) out << (it != a.begin() ? ", " : "") << *it; return out << '}'; } void dump() { cerr << "\n"; } template <class T, class... Ts> void dump(T a, Ts... x) { cerr << a << ", "; dump(x...); } #define debug(...) cerr << "[" #__VA_ARGS__ "]: ", dump(__VA_ARGS__) const int MAXN = 1e6 + 99; vector<int> add[MAXN]; vector<int> sub[MAXN]; int counter[3]; int n, m; bool zielona() { return counter[0] > 0 && counter[1] > 0 && counter[2] == 0; } int32_t main() { _upgrade; cin >> n >> m; rep(i, m) { int a, b, c; cin >> a >> b >> c; --a, --c; add[a].push_back(c); sub[b].push_back(c); } int res = 0; rep(i, n) { for (int a : add[i]) counter[a]++; for (int b : sub[i]) counter[b]--; if (zielona()) res++; } cout << res << endl; }
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 | #include <bits/stdc++.h> #include <math.h> using namespace std; #define endl "\n" #define mp make_pair #define st first #define nd second #define pii pair<int, int> #define pb push_back #define _upgrade ios_base::sync_with_stdio(0), cout.setf(ios::fixed), cout.precision(10), cin.tie(0), cout.tie(0); #define REP(i, n) for (int i = 0; i < (n); ++i) #define FWD(i, a, b) for (int i = (a); i < (b); ++i) #define rep(i, n) for (int i = 0; i < (n); ++i) #define fwd(i, a, b) for (int i = (a); i < (b); ++i) #define all(c) (c).begin(), (c).end() #define sz(X) (int)((X).size()) #define what(x) cerr << #x << " is " << x << endl; ostream &operator<<(ostream &out, string str) { for (char c : str) out << c; return out; } template <class L, class R> ostream &operator<<(ostream &out, pair<L, R> p) { return out << "(" << p.st << ", " << p.nd << ")"; } template <class T> auto operator<<(ostream &out, T a) -> decltype(a.begin(), out) { out << '{'; for (auto it = a.begin(); it != a.end(); it = next(it)) out << (it != a.begin() ? ", " : "") << *it; return out << '}'; } void dump() { cerr << "\n"; } template <class T, class... Ts> void dump(T a, Ts... x) { cerr << a << ", "; dump(x...); } #define debug(...) cerr << "[" #__VA_ARGS__ "]: ", dump(__VA_ARGS__) const int MAXN = 1e6 + 99; vector<int> add[MAXN]; vector<int> sub[MAXN]; int counter[3]; int n, m; bool zielona() { return counter[0] > 0 && counter[1] > 0 && counter[2] == 0; } int32_t main() { _upgrade; cin >> n >> m; rep(i, m) { int a, b, c; cin >> a >> b >> c; --a, --c; add[a].push_back(c); sub[b].push_back(c); } int res = 0; rep(i, n) { for (int a : add[i]) counter[a]++; for (int b : sub[i]) counter[b]--; if (zielona()) res++; } cout << res << endl; } |