제출 #1121034

#제출 시각아이디문제언어결과실행 시간메모리
1121034Mousa_Aboubaker나일강 (IOI24_nile)C++17
67 / 100
2061 ms18964 KiB
#include "nile.h" #include <bits/stdc++.h> using namespace std; vector<long long> calculate_costs(vector<int> W, vector<int> A, vector<int> B, vector<int> E) { vector<int> w = W, a = A, b = B, e = E; int n = w.size(), q = e.size(); vector<int> ord(n); iota(ord.begin(), ord.end(), 0); sort(ord.begin(), ord.end(), [&](int l, int r) { return w[l] < w[r]; }); vector<long long> RES(q); for(int i = 0; i < q; i++) { vector<int> par(n), sz(n + 1, 1); iota(par.begin(), par.end(), 0); auto find = [&](auto self, int u) -> int { return par[u] = (par[u] == u ? u : self(self, par[u])); }; auto unite = [&](int u, int v) -> bool { u = find(find, u); v = find(find, v); if(u == v) return false; if(sz[u] > sz[v]) swap(u, v); sz[v] += sz[u]; par[u] = v; return true; }; int d = e[i]; for(int j = 0; j + 1 < n; j++) { int k = ord[j]; int l = ord[j + 1]; if(w[l] - w[k] <= d) { unite(l, k); } } map<int, vector<int>> mp; for(int j = 0; j < n; j++) { int k = ord[j]; k = find(find, k); mp[k].push_back(ord[j]); } long long res = 0; for(auto [f, s]: mp) { if((int)s.size() % 2 == 0) { for(int j = 0; j < (int)s.size(); j++) res += b[s[j]]; } else { for(int j = 0; j < (int)s.size(); j++) res += b[s[j]]; long long mn = LLONG_MAX; int idx = -1; for(int j = 0; j < (int)s.size(); j++) { if(!(j & 1)) { mn = min(mn, (long long)a[s[j]] - b[s[j]]); } else { if(w[s[j + 1]] - w[s[j - 1]] <= d) { mn = min(mn, (long long)a[s[j]] - b[s[j]]); } } } res += mn; } } RES[i] = res; } return RES; }

컴파일 시 표준 에러 (stderr) 메시지

nile.cpp: In function 'std::vector<long long int> calculate_costs(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
nile.cpp:66:9: warning: unused variable 'idx' [-Wunused-variable]
   66 |     int idx = -1;
      |         ^~~
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