제출 #1096464

#제출 시각아이디문제언어결과실행 시간메모리
1096464cpptowinRobot (JOI21_ho_t4)C++17
0 / 100
231 ms191232 KiB
#include <bits/stdc++.h> #define fo(i, d, c) for (int i = d; i <= c; i++) #define fod(i, c, d) for (int i = c; i >= d; i--) #define maxn 1000010 #define N 1010 #define fi first #define se second #define pb emplace_back #define en cout << "\n"; #define int long long #define inf (int)1e18 #define bitcount(x) __builtin_popcountll(x) #define pii pair<int, int> #define vii vector<pii> #define lb(x) x & -x #define bit(i, j) ((i >> j) & 1) #define offbit(i, j) (i ^ (1LL << j)) #define onbit(i, j) (i | (1LL << j)) #define vi vector<int> #define all(x) x.begin(), x.end() #define ss(x) (int)x.size() template <typename T1, typename T2> bool minimize(T1 &a, T2 b) { if (a > b) { a = b; return true; } return false; } template <typename T1, typename T2> bool maximize(T1 &a, T2 b) { if (a < b) { a = b; return true; } return false; } using namespace std; const int nsqrt = 450; const int mod = 1e9 + 7; void add(int &x, int k) { x += k; x %= mod; if (x < 0) x += mod; } void del(int &x, int k) { x -= k; x %= mod; if (x < 0) x += mod; } vector<array<int, 3>> ke[maxn]; map<int, vii> adj[maxn]; int n, m; map<int, int> dp2[maxn], f[maxn]; int dp1[maxn]; void dij() { fo(i, 2, n) dp1[i] = inf; priority_queue<array<int, 3>, vector<array<int, 3>>, greater<array<int, 3>>> q; q.push({0, 1, 0}); while (ss(q)) { auto [du, u, color] = q.top(); q.pop(); if (color) { if (dp2[u][color] != du) continue; for (auto [v, p] : adj[u][color]) { int cost = f[u][color] - p; if (dp1[v] < du + cost) { dp1[v] = du + cost; q.push({dp1[v], v, 0}); } } } else { if (dp1[u] != du) continue; for (auto [v, c, p] : ke[u]) { if (minimize(dp1[v], du + p)) { q.push({dp1[v], v, 0}); } if (!dp2[v].count(c) or dp2[v][c] > du) { dp2[v][c] = du; q.push({du, v, c}); } if (minimize(dp1[v], du + f[u][c] - p)) { q.push({dp1[v], v, 0}); } } } } } main() { #define name "TASK" if (fopen(name ".inp", "r")) { freopen(name ".inp", "r", stdin); freopen(name ".out", "w", stdout); } ios_base::sync_with_stdio(false); cin.tie(NULL); cin >> n >> m; fo(i, 1, m) { int u, v, c, p; cin >> u >> v >> c >> p; ke[u].push_back({v, c, p}); ke[v].push_back({u, c, p}); adj[u][c].pb(v, p); adj[v][c].pb(u, p); f[u][c] += p; f[v][c] += p; } dij(); if (dp1[n] != inf) cout << dp1[n]; else cout << -1; }

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp:110:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  110 | main()
      | ^~~~
Main.cpp: In function 'int main()':
Main.cpp:115:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  115 |         freopen(name ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:116:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  116 |         freopen(name ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
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