제출 #332086

#제출 시각아이디문제언어결과실행 시간메모리
332086LifeHappen__Roller Coaster Railroad (IOI16_railroad)C++14
컴파일 에러
0 ms0 KiB
#include <bits/stdc++.h> #include "railroad.h" using namespace std; #define ii pair<int, int> #define fi first #define se second #define pb push_back struct dsu { vector <int> par; int n; dsu (int n) : n(n) { par.assign(n, 0); for (int i = 0; i < n; ++i) par[i] = i; } int findset(int u) { if(par[u] == u) return u; return par[u] = findset(par[u]); } bool mergeset(int u, int v) { u = findset(u), v = findset(v); if(u == v) return false; par[v] = u; return true; } }; int64_t plan_roller_coaster(vector<int> s, vector<int> t) { int n = s.size(); vector<int> vals; for (int i = 0; i < n; ++i) { vals.pb(s[i]); vals.pb(t[i]); } sort(begin(vals), end(vals)); vals.erase(unique(begin(vals), end(vals))); dsu pa(vals.size() + 5); vector<int> can(vals.size() + 5); for (int i = 0; i < n; ++i) { s[i] = lower_bound(begin(vals), end(vals), s[i]) - begin(vals); t[i] = lower_bound(begin(vals), end(vals), t[i]) - begin(vals); can[s[i]]++; can[t[i]]--; pa.mergeset(s[i], t[i]); } int m = vals.size(); int cur = 1; int64_t ans = 0; vector<tuple<int64_t, int, int>> ts; for (int i = m - 1; i > 0; --i) { cur += can[i]; if(cur < 0) { ans += 1ll * (vals[i - 1] - vals[i]) * cur; pa.mergeset(i - 1, i); } else if(cur > 0) pa.mergeset(i - 1, i); else ts.emplace_back(vals[i] - vals[i - 1], i, i - 1); } for (auto &_ : ts) { int64_t w; int u, v; tie(w, u, v) = _; if(pa.mergeset(u, v)) { ans += w; } } return ans; }

컴파일 시 표준 에러 (stderr) 메시지

railroad.cpp:29:9: error: ambiguating new declaration of 'int64_t plan_roller_coaster(std::vector<int>, std::vector<int>)'
   29 | int64_t plan_roller_coaster(vector<int> s, vector<int> t) {
      |         ^~~~~~~~~~~~~~~~~~~
In file included from railroad.cpp:2:
railroad.h:5:11: note: old declaration 'long long int plan_roller_coaster(std::vector<int>, std::vector<int>)'
    5 | long long plan_roller_coaster(std::vector<int> s, std::vector<int> t);
      |           ^~~~~~~~~~~~~~~~~~~