Submission #612189

#	Time	Username	Problem	Language	Result	Execution time	Memory
612189		M_W	Meetings (IOI18_meetings)	C++17	0 / 100	63 ms	24612 KiB

meetings

#include <bits/stdc++.h>
#define ii pair<long long, long long>
using namespace std;
long long t[750001 << 2];
vector<int> H;
int last = 0, N;
vector<ii> Q[750001];
vector<long long> fwt(200001, LLONG_MAX);

void ins_f(int v, long long a){
  for(; v > 0; v -= (v & -v)) fwt[v] = min(fwt[v], a);
}

long long query_f(int v){
  long long ret = LLONG_MAX;
  for(; v <= N; v += (v & -v)) ret = min(ret, fwt[v]);
  return ret;
}

long long query(int v, int tl, int tr, int l, int r){
    if(l > r) return -1;
    if(tl == l && tr == r) return t[v];
    int tm = (tl + tr) >> 1;

    return max(query(v * 2, tl, tm, l, min(r, tm)), query(v * 2 + 1, tm + 1, tr, max(l, tm + 1), r));
}

void ins(int v, int tl, int tr, int pos, int val){
    if(tl == pos && tr == pos){
        t[v] = val;
        return;
    }
    int tm = (tl + tr) >> 1;

    if(pos <= tm) ins(v * 2, tl, tm, pos, val);
    else ins(v * 2 + 1, tm + 1, tr, pos, val);
    t[v] = max(t[v * 2], t[v * 2 + 1]);
} 

vector<long long> minimum_costs(vector<int> H_tmp, vector<int> L, vector<int> R){
    H = H_tmp; N = H.size();
    for(int i = 0; i < L.size(); i++) Q[R[i]].push_back({L[i], i});

    vector<long long> ans(200001);
    for(int i = 0; i < N; i++){
        if(H[i] == 2){
            ins(1, 0, N, last + 1, i - last);
            last = i + 1; ins_f(i + 1, (i + 1) * 1ll);
        }
        for(auto x : Q[i]){
            long long val = query(1, 0, N, x.first + 1, i + 1);
            if(x.first == i){
              ans[x.second] = H[i]; continue;
            }

            if(x.first + 1 > last){
                val = max(val, i - x.first - 1 + (H[i] == 2 ? 0 : 1ll) + (H[x.first] == 2 ? 0 : 1ll));
            }
            else{
                val = max(val, i - last + (H[i] == 2 ? 0 : 1ll));
            }

            long long qq = query_f(x.first + 1);
            if(qq != LLONG_MAX) val = max(val, qq - (x.first + 1) - 1 + (H[x.first] == 2 ? 0 : 1ll));

            printf(">> %d %lld\n", i - x.first + 1, val);
            ans[x.second] = ((i - x.first + 1 - val) * 2ll) + (val * 1ll);
        }
    }
    ans.resize(L.size());
    return ans;
}

Compilation message (stderr)

meetings.cpp: In function 'std::vector<long long int> minimum_costs(std::vector<int>, std::vector<int>, std::vector<int>)':
meetings.cpp:42:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |     for(int i = 0; i < L.size(); i++) Q[R[i]].push_back({L[i], i});
      |                    ~~^~~~~~~~~~
meetings.cpp:66:25: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
   66 |             printf(">> %d %lld\n", i - x.first + 1, val);
      |                        ~^          ~~~~~~~~~~~~~~~
      |                         |                      |
      |                         int                    long long int
      |                        %lld

• Subtask 1: 0 / 4
• Subtask 2: 0 / 15
• Subtask 3: 0 / 17
• Subtask 4: 0 / 24
• Subtask 5: 0 / 40