func_code_string: #include <bits/stdc++.h>   using namespace std;   long long add(long long a, long long b) {     a += b;     if (a >= 1000000007) a -= 1000000007;     return a;   }   long long mul(long long a, long long b) {     return ((a % 1000000007) * (b % 1000000007)) % 1000000007;   }   long long binary_expo(long long base, long long expo) {     long long res = 1;     while (expo) {       if (expo % 2) {         res = mul(res, base);         expo /= 2;       }       base = mul(base, base);     }     return res;   }   vector<pair<long long, pair<long long, long long> > > v[1000002];   const long long N = 100002;   long long Arr[N], dep[N];   multiset<long long> S1[N], S2[N];   long long n;   long long BIT1[N], BIT2[N];   void update(long long BIT[], long long idx, long long val) {     while (idx <= n) {       BIT[idx] += val;       idx += (idx & (-idx));     }   }   long long query(long long BIT[], long long idx) {     long long sum = 0;     while (idx > 0) {       sum += BIT[idx];       idx -= (idx & (-idx));     }     return sum;   }   void solve() {     long long m, k;     cin >> n >> m >> k;     for (long long i = 1; i <= n; i++) {       Arr[i] = 1e12;       dep[i] = -1e12;     }     for (long long i = 0; i < m; i++) {       long long d, f, t, c;       cin >> d >> f >> t >> c;       v[d].push_back({f, {t, c}});       if (t == 0) {         Arr[f] = min(Arr[f], d);       } else {         dep[t] = max(dep[t], d);       }     }     long long minn = 1e12;     long long maxx = -1e12;     for (long long i = 1; i <= n; i++) {       if (Arr[i] == 1e12 or dep[i] == -1e12) {         cout <<  -1  << endl;         return;       }       maxx = max(maxx, Arr[i]);       minn = min(minn, dep[i]);     }     long long ms = maxx + 1;     long long me = minn - 1;     if (me - ms + 1 < k) {       cout <<  -1  << endl;       return;     }     for (long long i = 1000000; i > (ms + k - 1); i--) {       for (long long j = 0; j < v[i].size(); j++) {         pair<long long, pair<long long, long long> > p = v[i][j];         if (p.first == 0) {           long long val1 = 0;           if (S1[p.second.first].size() != 0) {             val1 = *(S1[p.second.first].begin());           }           S1[p.second.first].insert(p.second.second);           long long val = *(S1[p.second.first].begin());           update(BIT2, p.second.first, val - val1);         }       }     }     for (long long i = 1; i < ms; i++) {       for (long long j = 0; j < v[i].size(); j++) {         pair<long long, pair<long long, long long> > p = v[i][j];         if (p.second.first == 0) {           long long val1 = 0;           if (S2[p.first].size() != 0) {             val1 = *(S2[p.first].begin());           }           S2[p.first].insert(p.second.second);           long long val = *(S2[p.first].begin());           update(BIT1, p.first, val - val1);         }       }     }     long long ans = query(BIT1, n) + query(BIT2, n);     for (long long i = ms + k; i <= me; i++) {       long long ar = i - k;       long long de = i;       for (long long j = 0; j < v[i].size(); j++) {         pair<long long, pair<long long, long long> > p = v[i][j];         if (p.first == 0) {           long long val1 = 0;           if (S1[p.second.first].size() != 0) {             val1 = *(S1[p.second.first].begin());           }           S1[p.second.first].erase(S1[p.second.first].find(p.second.second));           long long val = *(S1[p.second.first].begin());           update(BIT2, p.second.first, val - val1);         }       }       for (long long j = 0; j < v[ar].size(); j++) {         pair<long long, pair<long long, long long> > p = v[ar][j];         if (p.second.first == 0) {           long long val1 = 0;           if (S2[p.first].size() != 0) {             val1 = *(S2[p.first].begin());           }           S2[p.first].insert(p.second.second);           long long val = *(S2[p.first].begin());           update(BIT1, p.first, val - val1);         }       }       ans = min(ans, query(BIT1, n) + query(BIT2, n));     }     cout << ans << endl;   }   signed main() {     long long t;     ios_base::sync_with_stdio(false);     t = 1;     while (t--) solve();     return 0;   }   