func_code_string: #include <bits/stdc++.h>   using namespace std;   stack<int> s[100005];   int n, m, k, from, to, d[100005], f[100005], t[100005], c[100005],       before[100005], cnt = 0;   bool vis[100005] = {false};   void swap(int &a, int &b) {     int t = a;     a = b;     b = t;   }   void qsort(int l, int r) {     int i = l, j = r, x = d[(l + r) >> 1];     do {       while (d[i] < x) i++;       while (d[j] > x) j--;       if (i <= j) {         swap(d[i], d[j]);         swap(f[i], f[j]);         swap(t[i], t[j]);         swap(c[i], c[j]);         i++;         j--;       }     } while (i <= j);     if (l < j) qsort(l, j);     if (i < r) qsort(i, r);   }   int max(int a, int b) {     if (a > b) return a;     return b;   }   int min(int a, int b) {     if (a < b) return a;     return b;   }   int main() {     scanf( %d%d%d , &n, &m, &k);     from = 0x3f3f3f3f;     to = 0;     for (int i = 1; i <= m; i++) {       scanf( %d%d%d%d , &d[i], &f[i], &t[i], &c[i]);       from = min(from, d[i]);       to = max(to, d[i]);     }     qsort(1, m);     for (int i = 1; i <= n; i++) before[i] = 1000005;     for (int i = m; i > 0; i--) {       if (f[i] == 0) {         int top;         if (!s[t[i]].empty()) top = s[t[i]].top();         if (s[t[i]].empty() || c[top] > c[i]) s[t[i]].push(i);       }     }     int now = 1, now2 = 1;     bool flag = true;     for (int i = 1; i <= n; i++)       if (s[i].empty()) {         flag = false;         break;       }     if (!flag) {       printf( -1 n );       return 0;     }     long long ans, val = 0, qwq;     for (int i = 1; i <= n; i++) {       val += 1000005;       int top = s[i].top();       val += c[top];     }     qwq = 20000000000000;     ans = qwq;     for (int start = from - 1; start <= to + 1; start++) {       if (!flag) break;       int end = start + k;       while (now <= m && d[now] < start) {         if (t[now] == 0) {           val -= before[f[now]];           before[f[now]] = min(before[f[now]], c[now]);           val += before[f[now]];           if (!vis[f[now]]) cnt++;           vis[f[now]] = true;         }         now++;       }       while (now2 <= m && d[now2] < end) {         if (f[now2] == 0) {           if (s[t[now2]].empty()) {             flag = false;             break;           }           int top = s[t[now2]].top();           if (d[top] < end) {             val -= c[top];             s[t[now2]].pop();             if (!s[t[now2]].empty()) val += c[s[t[now2]].top()];           }           if (s[t[now2]].empty()) flag = false;         }         now2++;       }       if (!flag) break;       if (cnt == n) ans = min(ans, val);     }     if (ans == qwq)       printf( -1 n );     else       printf( %lld n , ans);     return 0;   }   