oj.uz

답안 #1074929

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1074929 2024-08-25T16:46:42 Z bleahbleah 봉쇄 시간 (IOI23_closing) C++17
8 / 100
 165 ms 46972 KB 
#include "closing.h"

#include <vector>
#include <bits/stdc++.h>
#define all(x) (x).begin(),(x).end()
using namespace std;

using ll = long long;
#define int ll

#define sz(x) ((int)(x).size())

using pii = pair<int,int>;

const int nmax = 2e5 + 5;

ll dx[nmax], dy[nmax];
int p[nmax];
vector<pii> g[nmax];

void filld(int node, int f, ll *d) {
   p[node] = f;
   for(auto [x, c] : g[node]) {
      if(x == f) continue;
      d[x] = d[node] + c;
      filld(x, node, d);
   }
   return;
}

int separate(int N, ll S) {
   vector<pii> s;
   for(int i = 0; i < N; i++) {
      s.emplace_back(i, 1);
      s.emplace_back(i, 2);
   }
   sort(all(s), [&](auto a, auto b) {
      return (a.second == 1? dx[a.first] : dy[a.first]) < (b.second == 1? dx[b.first] : dy[b.first]);
   });
   
   vector<int> occ(N, 0);
   int cnt = 0;
   for(auto [x, t] : s) {
      if(occ[x]) continue;
      auto C = (t == 1? dx[x] : dy[x]);
      if(S < C) break;
      S -= C;
      occ[x] = 1;
      cnt++;
   }
   
   return cnt;
}



signed max_score(signed N, signed X, signed Y, long long S, std::vector<signed> U, std::vector<signed> V, std::vector<signed> W) {
   for(int i = 0; i <= N; i++) g[i].clear();
   
   for(int i = 0; i < sz(U); i++) {
      g[U[i]].emplace_back(V[i], W[i]);
      g[V[i]].emplace_back(U[i], W[i]);
   }
   
   dx[X] = dy[Y] = 0;
   filld(X, X, dx);
   filld(Y, Y, dy);
   
   const int opt1 = separate(N, S);
   //cerr << opt1 << '\n';
   
   vector<int> onchain(N, 0);
   int t = X;
   while(t != Y) {
      onchain[t] = 1;
      t = p[t];
   }
   onchain[Y] = 1;
   
   vector<pair<ll, ll>> s;
   for(int node = 0; node < N; node++) {
      //cerr << onchain[node] << ' ';
      if(onchain[node]) {
         int a = dx[node], b = dy[node];
         if(a > b) swap(a, b);
         S -= a;
         s.emplace_back(b - a, -1);
      }
      else {
         int a = dx[node], b = dy[node];
         if(a > b) swap(a, b);
         b -= a;
         if(a <= b) {
            s.emplace_back(a, -1);
            s.emplace_back(b, -1);
         }
         else {
            s.emplace_back(a, b);
         }
      }
   }
   //cerr << '\n' << S << '\n';
   
   if(S < 0) return opt1;
   int opt2 = 0;
   sort(all(s), [&](auto a, auto b) {
      auto C = (a.second == -1? 2 * a.first : a.first + a.second);
      auto D = (b.second == -1? 2 * b.first : b.first + b.second);
      return C < D;
   });
   
   for(int it = 0; it < sz(s); it++) {
      auto [a, b] = s[it];
      if(b == -1) {
         if(a > S) break;
         S -= a;
         opt2++;
      }
      else {
         if(a + b > S) {
            for(int j = it + 1; j < sz(s); j++) 
               a = min(a, s[j].first);
            if(S < a) break;
            opt2++;
            break;
         }
         else {
            S -= a + b;
            opt2++;
         }
      }
   }
   
   return max(opt1, opt2);
}

#undef int

Subtask #0
0.0 / 0.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 4956 KB 1st lines differ - on the 1st token, expected: '6', found: '5'
2 Halted 0 ms 0 KB -

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 160 ms 43336 KB Output is correct
2 Correct 165 ms 46972 KB Output is correct
3 Correct 79 ms 10396 KB Output is correct

Subtask #2
0.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4952 KB Output is correct
2 Incorrect 2 ms 5100 KB 1st lines differ - on the 1st token, expected: '30', found: '17'
3 Halted 0 ms 0 KB -

Subtask #3
0.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4952 KB Output is correct
2 Incorrect 2 ms 5100 KB 1st lines differ - on the 1st token, expected: '30', found: '17'
3 Halted 0 ms 0 KB -

Subtask #4
0.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4952 KB Output is correct
2 Incorrect 2 ms 5100 KB 1st lines differ - on the 1st token, expected: '30', found: '17'
3 Halted 0 ms 0 KB -

Subtask #5
0.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 4956 KB 1st lines differ - on the 1st token, expected: '6', found: '5'
2 Halted 0 ms 0 KB -

Subtask #6
0.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 4956 KB 1st lines differ - on the 1st token, expected: '6', found: '5'
2 Halted 0 ms 0 KB -

Subtask #7
0.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 4956 KB 1st lines differ - on the 1st token, expected: '6', found: '5'
2 Halted 0 ms 0 KB -

Subtask #8
0.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 4956 KB 1st lines differ - on the 1st token, expected: '6', found: '5'
2 Halted 0 ms 0 KB -

Subtask #9
0.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 4956 KB 1st lines differ - on the 1st token, expected: '6', found: '5'
2 Halted 0 ms 0 KB -