Submission #1784697
Source Code Expand
#include <algorithm> #include <iostream> #include <cstring> #include <cstdio> #include <cmath> using namespace std; typedef long long s64; inline int getint() { static char c; while ((c = getchar()) < '0' || c > '9'); int res = c - '0'; while ((c = getchar()) >= '0' && c <= '9') res = res * 10 + c - '0'; return res; } const int MaxN = 100000; const int MaxM = 100000; int n, m; struct halfEdge { int v, w; halfEdge *next; }; halfEdge adj_pool[MaxM * 2], *adj_tail = adj_pool; halfEdge *adj[MaxN + 1]; inline void addEdge(const int &u, const int &v, const int &w) { adj_tail->v = v, adj_tail->w = w; adj_tail->next = adj[u], adj[u] = adj_tail++; } int num[5]; bool inv; int col[MaxN + 1]; void dfs(const int &u, const int &now) { col[u] = now; ++num[col[u]], ++num[3]; for (halfEdge *e = adj[u]; e; e = e->next) { ++num[4]; int l = (now + e->w) % 3; if (!~col[e->v]) dfs(e->v, l); else if (col[e->v] != l) inv = true; } } int main() { cin >> n >> m; for (int i = 0; i < m; ++i) { int u = getint(), v = getint(); addEdge(u, v, 1); addEdge(v, u, 2); } for (int u = 1; u <= n; ++u) col[u] = -1; s64 res = 0; for (int u = 1; u <= n; ++u) if (!~col[u]) { inv = false; num[0] = num[1] = 0; num[2] = num[3] = num[4] = 0; dfs(u, 0); if (inv) res += (s64)num[3] * num[3]; else if (!num[0] || !num[1] || !num[2]) res += num[4] / 2; else { res += (s64)num[0] * num[1]; res += (s64)num[1] * num[2]; res += (s64)num[2] * num[0]; } } cout << res << endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | F - Blackout |
User | InvUsr |
Language | C++14 (GCC 5.4.1) |
Score | 1700 |
Code Size | 1671 Byte |
Status | AC |
Exec Time | 19 ms |
Memory | 9216 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 1700 / 1700 | ||||
Status |
|
|
Set Name | Test Cases |
---|---|
Sample | 0_00.txt, 0_01.txt, 0_02.txt |
All | 0_00.txt, 0_01.txt, 0_02.txt, 1_00.txt, 1_01.txt, 1_02.txt, 1_03.txt, 1_04.txt, 1_05.txt, 1_06.txt, 1_07.txt, 1_08.txt, 1_09.txt, 1_10.txt, 1_11.txt, 1_12.txt, 1_13.txt, 1_14.txt, 1_15.txt, 1_16.txt, 1_17.txt, 1_18.txt, 1_19.txt, 1_20.txt, 1_21.txt, 1_22.txt, 1_23.txt, 1_24.txt, 1_25.txt, 1_26.txt, 1_27.txt, 1_28.txt, 1_29.txt, 1_30.txt, 1_31.txt, 1_32.txt, 1_33.txt, 1_34.txt, 1_35.txt, 1_36.txt, 1_37.txt, 1_38.txt, 1_39.txt, 1_40.txt, 1_41.txt, 1_42.txt, 1_43.txt, 1_44.txt, 1_45.txt, 1_46.txt, 1_47.txt, 1_48.txt, 1_49.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
0_00.txt | AC | 1 ms | 256 KB |
0_01.txt | AC | 1 ms | 256 KB |
0_02.txt | AC | 1 ms | 256 KB |
1_00.txt | AC | 1 ms | 256 KB |
1_01.txt | AC | 2 ms | 640 KB |
1_02.txt | AC | 13 ms | 4480 KB |
1_03.txt | AC | 15 ms | 9216 KB |
1_04.txt | AC | 15 ms | 9216 KB |
1_05.txt | AC | 15 ms | 9216 KB |
1_06.txt | AC | 15 ms | 9216 KB |
1_07.txt | AC | 17 ms | 9216 KB |
1_08.txt | AC | 15 ms | 9216 KB |
1_09.txt | AC | 15 ms | 9216 KB |
1_10.txt | AC | 15 ms | 9216 KB |
1_11.txt | AC | 15 ms | 9216 KB |
1_12.txt | AC | 15 ms | 9216 KB |
1_13.txt | AC | 16 ms | 9216 KB |
1_14.txt | AC | 11 ms | 4480 KB |
1_15.txt | AC | 10 ms | 4480 KB |
1_16.txt | AC | 10 ms | 4480 KB |
1_17.txt | AC | 9 ms | 3328 KB |
1_18.txt | AC | 18 ms | 5760 KB |
1_19.txt | AC | 18 ms | 5760 KB |
1_20.txt | AC | 18 ms | 5632 KB |
1_21.txt | AC | 18 ms | 5760 KB |
1_22.txt | AC | 18 ms | 5760 KB |
1_23.txt | AC | 18 ms | 5760 KB |
1_24.txt | AC | 18 ms | 5632 KB |
1_25.txt | AC | 18 ms | 5760 KB |
1_26.txt | AC | 18 ms | 5760 KB |
1_27.txt | AC | 18 ms | 5632 KB |
1_28.txt | AC | 18 ms | 5632 KB |
1_29.txt | AC | 18 ms | 5760 KB |
1_30.txt | AC | 18 ms | 5632 KB |
1_31.txt | AC | 18 ms | 5760 KB |
1_32.txt | AC | 18 ms | 5760 KB |
1_33.txt | AC | 18 ms | 5760 KB |
1_34.txt | AC | 19 ms | 5632 KB |
1_35.txt | AC | 17 ms | 5120 KB |
1_36.txt | AC | 17 ms | 5504 KB |
1_37.txt | AC | 18 ms | 5760 KB |
1_38.txt | AC | 16 ms | 4864 KB |
1_39.txt | AC | 16 ms | 4608 KB |
1_40.txt | AC | 19 ms | 5760 KB |
1_41.txt | AC | 18 ms | 5760 KB |
1_42.txt | AC | 16 ms | 5120 KB |
1_43.txt | AC | 17 ms | 5248 KB |
1_44.txt | AC | 18 ms | 5760 KB |
1_45.txt | AC | 15 ms | 4352 KB |
1_46.txt | AC | 18 ms | 5760 KB |
1_47.txt | AC | 19 ms | 5760 KB |
1_48.txt | AC | 17 ms | 4992 KB |
1_49.txt | AC | 18 ms | 5504 KB |