Submission #752729

#	Time	Username	Problem	Language	Result	Execution time	Memory
752729		Sam_a17	Food Court (JOI21_foodcourt)	C++17	100 / 100	893 ms	269160 KiB

foodcourt

#define _CRT_SECURE_NO_WARNINGS
#include <bits/stdc++.h>
//#include "temp.cpp"
#include <cstdio>
using namespace std;
 
#ifndef ONLINE_JUDGE
#define dbg(x) cerr << #x <<" "; print(x); cerr << endl;
#else
#define dbg(x)
#endif
 
#define sz(x) (int((x).size()))
#define len(x) (int)x.length()
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define clr(x) (x).clear()
#define uniq(x) x.resize(unique(all(x)) - x.begin());
 
#define pb push_back
#define popf pop_front
#define popb pop_back
#define ld long double
#define ll long long
 
void print(long long t) {cerr << t;}
void print(int t) {cerr << t;}
void print(string t) {cerr << t;}
void print(char t) {cerr << t;}
void print(double t) {cerr << t;}
void print(unsigned long long t) {cerr << t;}
void print(long double t) {cerr << t;}
 
template <class T, class V> void print(pair <T, V> p);
template <class T> void print(vector <T> v);
template <class T> void print(set <T> v);
template <class T, class V> void print(map <T, V> v);
template <class T> void print(multiset <T> v);
template <class T> void print(T v[],T n) {cerr << "["; for(int i = 0; i < n; i++) {cerr << v[i] << " ";} cerr << "]";}
template <class T, class V> void print(pair <T, V> p) {cerr << "{"; print(p.first); cerr << ","; print(p.second); cerr << "}";}
template <class T> void print(vector <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(deque <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(set <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(multiset <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T, class V> void print(map <T, V> v) {cerr << "[ "; for (auto i : v) {print(i); cerr << " ";} cerr << "]";}
 
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
#define nl '\n'
 
// for random generations
mt19937 myrand(chrono::steady_clock::now().time_since_epoch().count());
// mt19937 myrand(131);
 
// for grid problems
int dx[8] = {-1,0,1,0,1,-1,1,-1};
int dy[8] = {0,1,0,-1,1,1,-1,-1};

long long ka() {
	long long x = 0;
	bool z = false;
	while (1)
	{
		char y = getchar();
		if (y == '-')
			z = true;
		else if ('0' <= y && y <= '9')
			x = x * 10 + y - '0';
		else
		{
			if (z)
				x *= -1;
			return x;
		}
	}
}

// lowest / (1 << 17) >= 1e5 / (1 << 18) >= 2e5 / (1 << 21) >= 1e6
void fastIO() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr); cout.tie(nullptr);
}
// file in/out
void setIO(string str = "") {
  fastIO();
 
  if (str != "") {
    freopen((str + ".in").c_str(), "r", stdin);
    freopen((str + ".out").c_str(), "w", stdout);
  }
}
 
// Indexed Set
template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
const int N = 250005;
long long n, m, q;
vector<pair<long long, pair<long long, long long>>> to_add[N], to_del[N], qq[N];
vector<pair<long long, pair<long long, long long>>> to_add2[N], to_del2[N];
deque<pair<long long, pair<long long, long long>>> st[N];
long long cnt[N];

struct node {
  long long type;
  long long l, r, k, c;
};

vector<node> queries;

struct segTree {
 
  struct node {
    long long value, cur, lazy;
  };

  int size = 1;
  vector<node> tree;

  void init(int s) {
    while(s > size) {
      size *= 2;
    }
    tree.assign(2 * size - 1, {0, 0, 0});
  }

  void propagate(int x, int lx, int rx) {
    if(rx - lx == 1 || !tree[x].lazy) {
      return;
    }

    int mid = (lx + rx) / 2;
    tree[2 * x + 1].value += tree[x].lazy * (mid - lx);
    tree[2 * x + 1].lazy += tree[x].lazy;

    tree[2 * x + 2].value += tree[x].lazy * (rx - mid);
    tree[2 * x + 2].lazy += tree[x].lazy;

    tree[x].lazy = 0;
  }

  void upd(int l, int r, long long value, long long vul, int x, int lx, int rx) {
    propagate(x, lx, rx);
    if(lx >= r || rx <= l) {
      return;
    }

    if(lx >= l && rx <= r) {
      if(value == -1) {
        tree[x].value = 0;
        tree[x].cur = 0;
        tree[x].lazy = 0;
      } else {
        tree[x] = {value, vul, value};
        propagate(x, lx, rx);
      }
      return;
    }

    int mid = (lx + rx) / 2;
    upd(l, r, value, vul, 2 * x + 1, lx, mid);
    upd(l, r, value, vul, 2 * x + 2, mid, rx);
    tree[x].value = tree[2 * x + 1].value + tree[2 * x + 2].value;
  }

  void upd(int l, int r, long long value, long long vul) {
    upd(l, r, value, vul, 0, 0, size);
  }

  long long sum(int l, int r, int x, int lx, int rx) {
    propagate(x, lx, rx);
    if(lx >= r || rx <= l) {
      return 0;
    }

    if(lx >= l && rx <= r) {
      return tree[x].value;
    }

    int mid = (lx + rx) / 2;
    long long s1 = sum(l, r, 2 * x + 1, lx, mid);
    long long s2 = sum(l, r, 2 * x + 2, mid, rx);
    return s1 + s2;
  }

  long long sum(int l, int r) {
    return sum(l, r, 0, 0, size);
  }

  pair<long long, long long> qry(long long d, int x, int lx, int rx) {
    propagate(x, lx, rx);
    if(rx - lx == 1) {
      return {tree[x].cur, lx};
    }

    int mid = (lx + rx) / 2;
    if(tree[2 * x + 1].value >= d) {
      return qry(d, 2 * x + 1, lx, mid);
    } else { 
      return qry(d - tree[2 * x + 1].value, 2 * x + 2, mid, rx);
    }
  }

  pair<long long, long long> qry(long long d) {
    if(tree[0].value < d) {
      return {0ll, 0ll};
    }

    return qry(d, 0, 0, size);
  }
};
 
segTree seg;


struct segtree {
  struct node {
  long long mn, cnt, sum, prefix, suffix, maxSubset;
  };

  node combine (node a, node b) {
    node c;
    c.mn = min(a.mn, b.mn);
    c.sum = a.sum + b.sum;
    c.prefix = max(a.sum + b.prefix, a.prefix);
    c.suffix = max(b.sum + a.suffix, b.suffix);
    c.maxSubset = max({a.maxSubset, b.maxSubset, a.suffix + b.prefix});
    return c;
  }

  vector<node> mTree;
  int size;

  void init(ll n) {
    size = 1;
    while(size < n)  {
      size *= 2;
    }
    mTree.assign(2 * size - 1, {0, 0, 0,0,0,0});
  }

  void set(int u, ll v, int x, int lx, int rx) {
    if(rx - lx == 1) {
      mTree[x] = {v, 1, v, max(v, 0LL),max(v, 0LL),max(v, 0LL)};
      return;
    }

    int m = (lx + rx) / 2;
    if(u < m) {
      set(u, v, 2 * x + 1, lx, m);
    }else {
      set(u, v, 2 * x + 2, m, rx);
    }
    mTree[x] = combine(mTree[2 * x + 1], mTree[2 * x + 2]);
  }

  void set(int u, ll v) {
    set(u, v, 0, 0, size);
  }

  node range (int l, int r, int x, int lx, int rx) {
    if(l >= rx || lx >= r) {
      return {INT32_MAX, 1, 0,0,0,0};
    }
    if(lx >= l && r >= rx) {
      return mTree[x];
    }

    int m = (rx + lx) / 2;
    node s1 = range(l, r, 2 * x + 1, lx, m);
    node s2 = range(l, r, 2 * x + 2, m, rx);
    return combine(s1, s2);
  }

  node range(int l, int r) {
    return range(l, r, 0,0,size);
  }
};

segtree seg_sum;

void solve_() {
  cin >> n >> m >> q;

  int oki = 1;
  for(int i = 0; i < q; i++) {
    int type; cin >> type;

    if(type == 1) {
      long long l, r, c, k; 
      cin >> l >> r >> c >> k;
      queries.push_back({type, l, r, k, c});
    } else if(type == 2) {
      long long l, r, k; cin >> l >> r >> k;
      queries.push_back({type, l, r, k, -1});
      oki = 0;
    } else {
      long long l, r; cin >> l >> r;
      queries.push_back({type, l, r, -1, -1});
    }
  }

  // if(oki) {
    seg.init(q + 1);
    seg_sum.init(q + 1);
    vector<long long> answ(q + 1), out(q + 1);
    for(int i = 0; i < q; i++) {
      int type = queries[i].type;
      if(type == 1) {
        long long l = queries[i].l;
        long long r = queries[i].r;
        long long c = queries[i].c;
        long long k = queries[i].k;

        to_add[l].push_back({i, {k, c}});
        to_del[r + 1].push_back({i, {k, c}});
      } else if(type == 3) {
        long long a = queries[i].l;
        long long b = queries[i].r;
        qq[a].push_back({i, {b, -1}});
        out[i] = 1;
      } else {
        long long l = queries[i].l;
        long long r = queries[i].r;
        long long k = queries[i].k;

        to_add2[l].push_back({i, {k, -1}});
        to_del2[r + 1].push_back({i, {k, -1}});
      }
    }

    vector<long long> sub(q + 1);
    for(int i = 1; i <= n; i++) {
      for(auto j: to_add[i]) {
        seg.upd(j.first, j.first + 1, j.second.first, j.second.second);
        seg_sum.set(j.first, j.second.first);
      }

      for(auto j: to_del[i]) {
        seg.upd(j.first, j.first + 1, -1, -1);
        seg_sum.set(j.first, 0);
      } 
      
      for(auto j: to_add2[i]) {
        seg_sum.set(j.first, -j.second.first);
      }

      for(auto j: to_del2[i]) {
        seg_sum.set(j.first, 0);
      }

      for(auto j: qq[i]) {
        long long sfe = seg_sum.range(0, j.first + 1).suffix;
        if(j.second.first > sfe) {
          answ[j.first] = 0;
          continue;
        }

        long long all = seg.sum(0, j.first + 1);
        all -= sfe;
        all += j.second.first;
        answ[j.first] = seg.qry(all).first;
      }
    }

    for(int i = 0; i < q; i++) {
      if(out[i]) {
        cout << answ[i] << '\n';
      }
    }

  // } else {
  //   long long it = 0, ok = 1;
  //   set<int> not_empty;
  //   vector<bool> have(n + 1);
  //   for(int t = 0; t < q; t++) {
  //     int type = queries[t].type;
  //     if(type == 1) {
  //       long long l, r, c, k;
  //       l = queries[t].l;
  //       r = queries[t].r;
  //       c = queries[t].c;
  //       k = queries[t].k;
  //       for(int i = l; i <= r; i++) {
  //         cnt[i] += k; 
  //         st[i].push_back({it, {c, k}});
  //         if(!have[i]) {
  //           have[i] = true;
  //           not_empty.insert(i);
  //         }
  //       }

  //       if(k != 1) ok = 0;
  //     } else if(type == 2) {
  //       long long l, r, k; 
  //       l = queries[t].l;
  //       r = queries[t].r;
  //       k = queries[t].k;
  //       if(k != 1) ok = 0;

  //       auto it = not_empty.lower_bound(l);
  //       vector<int> to_del;
  //       while(it != not_empty.end() && *it <= r) {
  //         int i = *it;
  //         if(ok) {
  //           if(!st[i].empty()) {
  //             st[i].pop_front();
  //           }  
  //         } else {
  //           long long curr = k;
  //           while(!st[i].empty()) {
  //             if(curr >= st[i].front().second.second) {
  //               curr -= st[i].front().second.second;
  //               st[i].pop_front();
  //             } else {
  //               st[i].front().second.second -= curr;
  //               break;
  //             }
  //           }
  //         }
  //         cnt[i] -= k;
  //         cnt[i] = max(cnt[i], 0ll);
  //         if(cnt[i] == 0) {
  //           to_del.push_back(i);
  //         }
  //         it = next(it);
  //       }

  //       for(auto i: to_del) {
  //         have[i] = false;
  //         not_empty.erase(i);
  //       }

  //     } else {
  //       long long a, b; 
  //       // cin >> a >> b;
  //       a = queries[t].l;
  //       b = queries[t].r;

  //       if(cnt[a] < b) {
  //         cout << 0 << '\n';
  //       } else {
  //         if(ok) {
  //           cout << st[a][b - 1].second.first << '\n';
  //         } else {
  //           for(int i = 0; i < sz(st[a]); i++) {
  //             if(b > st[a][i].second.second) {
  //               b -= st[a][i].second.second;
  //             } else {
  //               cout << st[a][i].second.first << '\n';
  //               break;
  //             }
  //           }
  //         }
  //       }
  //     }
  //     it++;
  //   }
  // }
}
 
int main() {
  setIO();
  
  auto solve = [&](int test_case)-> void {
    while(test_case--) {
      solve_();
    }
  };
 
  int test_cases = 1; 
  // cin >> test_cases;
  solve(test_cases);
 
  return 0;
}

Compilation message (stderr)

foodcourt.cpp: In function 'void solve_()':
foodcourt.cpp:283:7: warning: variable 'oki' set but not used [-Wunused-but-set-variable]
  283 |   int oki = 1;
      |       ^~~
foodcourt.cpp: In function 'void setIO(std::string)':
foodcourt.cpp:88:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   88 |     freopen((str + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foodcourt.cpp:89:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   89 |     freopen((str + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 2 / 2
• Subtask 2: 5 / 5
• Subtask 3: 7 / 7
• Subtask 4: 21 / 21
• Subtask 5: 15 / 15
• Subtask 6: 13 / 13
• Subtask 7: 26 / 26
• Subtask 8: 11 / 11