func_code_string: #include <bits/stdc++.h>   using namespace std;   struct edge {     short to, cap, rev;     edge(int _a = 0, int _b = 0, int _c = 0) {       to = _a;       cap = _b;       rev = _c;     }   };   int S, T;   int dist[30010];   int cur[30010];   vector<edge> adj[30010];   int q[30010];   int hd, tl;   inline void addedge(int u, int v, int cap) {     adj[u].push_back(edge(v, cap, adj[v].size()));     adj[v].push_back(edge(u, 0, adj[u].size() - 1));   }   int dfs(int i, short fl) {     if (i == T) return fl;     short lf = fl;     for (int &j = cur[i]; ~j; --j) {       edge &e = adj[i][j];       if (e.cap && dist[e.to] == dist[i] + 1) {         short d = dfs(e.to, min(lf, e.cap));         e.cap -= d;         adj[e.to][e.rev].cap += d;         lf -= d;         if (!lf) return fl;       }     }     dist[i] = -1;     return fl - lf;   }   int Dinic() {     int res = 0;     while (true) {       memset(dist, 0, sizeof(dist));       dist[q[hd = tl = 0] = S] = 1;       while (hd <= tl) {         int i = q[hd++];         cur[i] = adj[i].size() - 1;         for (int j = cur[i]; ~j; --j) {           edge &e = adj[i][j];           if (e.cap && !dist[e.to]) {             dist[e.to] = dist[i] + 1;             q[++tl] = e.to;           }         }       }       if (!dist[T]) break;       int fl;       while (fl = dfs(S, 10000)) res += fl;     }     return res;   }   int bel[5010];   int tpe[5010];   int main(void) {     int n, m;     scanf( %d%d , &n, &m);     S = 0;     T = 30000;     vector<pair<pair<int, int>, int> > v;     for (int i = 1; i <= 8191; ++i) {       addedge(n + i, n + (i << 1), 10000);       addedge(n + i, n + (i << 1 | 1), 10000);     }     for (int i = 1; i <= n; ++i) {       int a, b, c;       scanf( %d%d , &tpe[i], &a);       switch (tpe[i]) {         case 0: {           while (a--) {             scanf( %d , &b);             addedge(i, b + 8191 + n, 1);           }           break;         }         case 1: {           scanf( %d , &b);           v.push_back(make_pair(make_pair(a, b), i));           int l = a + 8191, r = b + 8191;           while (l <= r) {             if (l & 1) addedge(i, n + l, 1), l++;             if (!(r & 1)) addedge(i, n + r, 1), r--;             l >>= 1;             r >>= 1;           }           break;         }         case 2: {           scanf( %d%d , &b, &c);           addedge(i, a + 8191 + n, 1);           addedge(i, b + 8191 + n, 1);           addedge(i, c + 8191 + n, 1);           break;         }       }     }     sort(v.begin(), v.end());     for (int i = 1; i <= n; ++i) {       if (tpe[i] != 2) {         addedge(S, i, 1);       }     }     for (int i = 1; i <= n; ++i) {       if (tpe[i] == 2) {         addedge(S, i, 2);       }     }     for (int i = 1; i <= m; ++i) {       addedge(n + 8191 + i, T, 1);     }     printf( %d n , Dinic());     for (int i = 1; i <= m; ++i) {       for (int j = adj[i + 8191 + n].size() - 1; ~j; --j) {         edge &e = adj[i + 8191 + n][j];         if (e.cap && e.to != T) {           bel[i] = e.to;         }       }     }     multiset<pair<pair<int, int>, int> > s;     int pnt = 0, vs = v.size();     for (int i = 1; i <= m; ++i) {       if (bel[i] <= n && tpe[bel[i]] != 1) continue;       while (pnt < vs && v[pnt].first.first <= i) {         s.insert(make_pair(make_pair(v[pnt].first.second, v[pnt].first.first),                            v[pnt].second));         ++pnt;       }       while (!s.empty() && s.begin()->first.first < i) s.erase(s.begin());       if (!s.empty()) bel[i] = s.begin()->second, s.erase(s.begin());     }     for (int i = 1; i <= m; ++i) {       if (bel[i]) printf( %d %d n , bel[i], i);     }     return 0;   }   