Submission #2504586
Source Code Expand
/** * File : F.cpp * Author : Kazune Takahashi * Created : 2018-5-12 22:17:51 * Powered by Visual Studio Code */ #include <iostream> #include <iomanip> // << fixed << setprecision(xxx) #include <algorithm> // do { } while ( next_permutation(A, A+xxx) ) ; #include <vector> #include <string> // to_string(nnn) // substr(m, n) // stoi(nnn) #include <complex> #include <tuple> #include <queue> #include <stack> #include <map> // if (M.find(key) != M.end()) { } #include <set> #include <random> // random_device rd; mt19937 mt(rd()); #include <cctype> #include <cassert> #include <cmath> #include <cstdio> #include <cstdlib> using namespace std; #define DEBUG 0 // change 0 -> 1 if we need debug. typedef long long ll; // const int dx[4] = {1, 0, -1, 0}; // const int dy[4] = {0, 1, 0, -1}; // const int C = 1e6+10; // const ll M = 1000000007; int N; int x[100010]; int y[100010]; string S; vector<int> T[100010]; vector<int> V[100010]; int root; int parent[100010]; bool need[100010]; int maxi = 0; int dfs(int v) { int ans = (need[v] ? 1 : 0); vector<int> X; for (auto e : V[v]) { if (e == parent[v]) { continue; } else { parent[e] = v; X.push_back(dfs(e)); } } if ((int)X.size() == 0) { return ans; } else if ((int)X.size() == 1) { ans += X[0]; maxi = max(maxi, ans); return ans; } else { sort(X.begin(), X.end()); reverse(X.begin(), X.end()); ans += X[0] + X[1]; maxi = max(maxi, ans); return ans - X[1]; } } int main() { int N; cin >> N; for (auto i = 0; i < N - 1; i++) { cin >> x[i] >> y[i]; x[i]--; y[i]--; T[x[i]].push_back(y[i]); T[y[i]].push_back(x[i]); } cin >> S; bool allb = true; for (auto i = 0; i < N; i++) { if (S[i] == 'W') { allb = false; break; } } if (allb) { cout << 0 << endl; return 0; } stack<int> st; for (auto i = 0; i < N; i++) { if ((int)T[i].size() == 1 && S[i] == 'B') { // cerr << i << " pushed." << endl; st.push(i); } } bool del[100010]; fill(del, del + 100010, false); while (!st.empty()) { int now = st.top(); st.pop(); int cnt = 0; if (del[now]) { continue; } for (auto e : T[now]) { if (!del[e]) { cnt++; } } if (cnt <= 1) { del[now] = true; // cerr << "del[" << now << "]" << endl; for (auto f : T[now]) { if (!del[f] && S[f] == 'B') { st.push(f); } } } } int M = 0; for (auto i = 0; i < N - 1; i++) { if (!del[x[i]] && !del[y[i]]) { V[x[i]].push_back(y[i]); V[y[i]].push_back(x[i]); M++; } } M++; int cost = 0; fill(need, need + 100010, false); for (auto i = 0; i < N; i++) { if (del[i]) { continue; } if ((((int)V[i].size()) % 2 == 0) ^ (S[i] == 'B')) { cost++; need[i] = true; } } // cerr << "cost = " << cost << endl; for (auto i = 0; i < N; i++) { if (!del[i] && S[i] == 'W') { root = i; break; } } parent[root] = -1; dfs(root); cout << 2 * (M - 1) + cost - maxi * 2 << endl; }
Submission Info
Submission Time | |
---|---|
Task | F - Monochrome Cat |
User | kazunetakahashi |
Language | C++14 (GCC 5.4.1) |
Score | 0 |
Code Size | 3424 Byte |
Status | TLE |
Exec Time | 2104 ms |
Memory | 22016 KB |
Judge Result
Set Name | Sample | All | ||||||
---|---|---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 0 / 800 | ||||||
Status |
|
|
Set Name | Test Cases |
---|---|
Sample | 0_000.txt, 0_001.txt, 0_002.txt, 0_003.txt |
All | 0_000.txt, 0_001.txt, 0_002.txt, 0_003.txt, 1_003.txt, 1_004.txt, 1_005.txt, 1_006.txt, 1_007.txt, 1_008.txt, 1_009.txt, 1_010.txt, 1_011.txt, 1_012.txt, 1_013.txt, 1_014.txt, 1_015.txt, 1_016.txt, 1_017.txt, 1_018.txt, 1_019.txt, 1_020.txt, 1_021.txt, 1_022.txt, 1_023.txt, 1_024.txt, 1_025.txt, 1_026.txt, 1_027.txt, 1_028.txt, 1_029.txt, 1_030.txt, 1_031.txt, 1_032.txt, 1_033.txt, 1_034.txt, 1_035.txt, 1_036.txt, 1_037.txt, 1_038.txt, 1_039.txt, 1_040.txt, 1_041.txt, 1_042.txt, 1_043.txt, 1_044.txt, 1_045.txt, 1_046.txt, 1_047.txt, 1_048.txt, 1_049.txt, 1_050.txt, 1_051.txt, 1_052.txt, 1_053.txt, 1_054.txt, 1_055.txt, 1_056.txt, 1_057.txt, 1_058.txt, 1_059.txt, 1_060.txt, 1_061.txt, 1_062.txt, 1_063.txt, 1_064.txt, 1_065.txt, 1_066.txt, 1_067.txt, 1_068.txt, 1_069.txt, 1_070.txt, 1_071.txt, 1_072.txt, 1_073.txt, 1_074.txt, 1_075.txt, 1_076.txt, 1_077.txt, 1_078.txt, 1_079.txt, 1_080.txt, 1_081.txt, 1_082.txt, 1_083.txt, 1_084.txt, 1_085.txt, 1_086.txt, 1_087.txt, 1_088.txt, 1_089.txt, 1_090.txt, 1_091.txt, 1_092.txt, 1_093.txt, 1_094.txt, 1_095.txt, 1_096.txt, 1_097.txt, 1_098.txt, 1_099.txt, 1_100.txt, 1_101.txt, 1_102.txt, 1_103.txt, 1_104.txt, 1_105.txt, 1_106.txt, 1_107.txt, 1_108.txt, 1_109.txt, 1_110.txt, 1_111.txt, 1_112.txt, 1_113.txt, 1_114.txt, 1_115.txt, 1_116.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
0_000.txt | AC | 3 ms | 5120 KB |
0_001.txt | AC | 3 ms | 5120 KB |
0_002.txt | AC | 3 ms | 4992 KB |
0_003.txt | AC | 3 ms | 5120 KB |
1_003.txt | AC | 3 ms | 5120 KB |
1_004.txt | AC | 3 ms | 5120 KB |
1_005.txt | AC | 3 ms | 4992 KB |
1_006.txt | AC | 3 ms | 5120 KB |
1_007.txt | AC | 3 ms | 5120 KB |
1_008.txt | AC | 3 ms | 5120 KB |
1_009.txt | AC | 3 ms | 5120 KB |
1_010.txt | AC | 3 ms | 5120 KB |
1_011.txt | AC | 3 ms | 4992 KB |
1_012.txt | AC | 3 ms | 5120 KB |
1_013.txt | AC | 3 ms | 5120 KB |
1_014.txt | AC | 3 ms | 5120 KB |
1_015.txt | AC | 3 ms | 5120 KB |
1_016.txt | AC | 3 ms | 5120 KB |
1_017.txt | AC | 3 ms | 4992 KB |
1_018.txt | AC | 3 ms | 5120 KB |
1_019.txt | AC | 3 ms | 5120 KB |
1_020.txt | AC | 3 ms | 4992 KB |
1_021.txt | AC | 3 ms | 5120 KB |
1_022.txt | AC | 3 ms | 5120 KB |
1_023.txt | AC | 3 ms | 4992 KB |
1_024.txt | AC | 3 ms | 5120 KB |
1_025.txt | AC | 3 ms | 5120 KB |
1_026.txt | AC | 3 ms | 5120 KB |
1_027.txt | AC | 3 ms | 5120 KB |
1_028.txt | AC | 3 ms | 5120 KB |
1_029.txt | AC | 3 ms | 4992 KB |
1_030.txt | AC | 3 ms | 5120 KB |
1_031.txt | AC | 3 ms | 5120 KB |
1_032.txt | AC | 3 ms | 5120 KB |
1_033.txt | AC | 3 ms | 5120 KB |
1_034.txt | AC | 3 ms | 5120 KB |
1_035.txt | AC | 3 ms | 4992 KB |
1_036.txt | AC | 3 ms | 5120 KB |
1_037.txt | AC | 3 ms | 5120 KB |
1_038.txt | AC | 3 ms | 5120 KB |
1_039.txt | AC | 3 ms | 5120 KB |
1_040.txt | AC | 3 ms | 5120 KB |
1_041.txt | AC | 3 ms | 4992 KB |
1_042.txt | AC | 3 ms | 5120 KB |
1_043.txt | AC | 3 ms | 5120 KB |
1_044.txt | AC | 3 ms | 5120 KB |
1_045.txt | AC | 38 ms | 10368 KB |
1_046.txt | AC | 47 ms | 12288 KB |
1_047.txt | AC | 81 ms | 8960 KB |
1_048.txt | AC | 63 ms | 8320 KB |
1_049.txt | AC | 81 ms | 17024 KB |
1_050.txt | AC | 67 ms | 14336 KB |
1_051.txt | AC | 69 ms | 12152 KB |
1_052.txt | AC | 16 ms | 6528 KB |
1_053.txt | AC | 63 ms | 8824 KB |
1_054.txt | AC | 828 ms | 6780 KB |
1_055.txt | AC | 68 ms | 12152 KB |
1_056.txt | AC | 36 ms | 7420 KB |
1_057.txt | AC | 5 ms | 5248 KB |
1_058.txt | AC | 46 ms | 10240 KB |
1_059.txt | AC | 29 ms | 6400 KB |
1_060.txt | AC | 63 ms | 8320 KB |
1_061.txt | AC | 90 ms | 14208 KB |
1_062.txt | AC | 43 ms | 9856 KB |
1_063.txt | AC | 57 ms | 10112 KB |
1_064.txt | AC | 149 ms | 8192 KB |
1_065.txt | AC | 7 ms | 5248 KB |
1_066.txt | AC | 1288 ms | 8700 KB |
1_067.txt | AC | 19 ms | 6656 KB |
1_068.txt | AC | 327 ms | 8192 KB |
1_069.txt | AC | 27 ms | 7168 KB |
1_070.txt | AC | 45 ms | 8320 KB |
1_071.txt | AC | 66 ms | 8448 KB |
1_072.txt | AC | 44 ms | 7296 KB |
1_073.txt | AC | 11 ms | 5888 KB |
1_074.txt | AC | 8 ms | 5504 KB |
1_075.txt | AC | 43 ms | 8448 KB |
1_076.txt | AC | 100 ms | 11776 KB |
1_077.txt | AC | 64 ms | 8320 KB |
1_078.txt | AC | 27 ms | 6400 KB |
1_079.txt | AC | 43 ms | 8320 KB |
1_080.txt | AC | 45 ms | 8192 KB |
1_081.txt | AC | 109 ms | 17792 KB |
1_082.txt | AC | 114 ms | 20864 KB |
1_083.txt | AC | 79 ms | 9088 KB |
1_084.txt | AC | 84 ms | 9216 KB |
1_085.txt | AC | 115 ms | 22016 KB |
1_086.txt | AC | 115 ms | 20992 KB |
1_087.txt | AC | 92 ms | 14200 KB |
1_088.txt | AC | 85 ms | 12152 KB |
1_089.txt | AC | 75 ms | 9464 KB |
1_090.txt | TLE | 2104 ms | 9848 KB |
1_091.txt | AC | 89 ms | 14200 KB |
1_092.txt | AC | 73 ms | 9464 KB |
1_093.txt | AC | 112 ms | 15616 KB |
1_094.txt | AC | 107 ms | 16896 KB |
1_095.txt | AC | 80 ms | 9088 KB |
1_096.txt | AC | 86 ms | 9344 KB |
1_097.txt | AC | 111 ms | 17280 KB |
1_098.txt | AC | 103 ms | 15744 KB |
1_099.txt | AC | 100 ms | 13436 KB |
1_100.txt | AC | 93 ms | 12028 KB |
1_101.txt | AC | 77 ms | 9212 KB |
1_102.txt | TLE | 2027 ms | 9596 KB |
1_103.txt | AC | 105 ms | 13436 KB |
1_104.txt | AC | 88 ms | 11132 KB |
1_105.txt | AC | 109 ms | 12800 KB |
1_106.txt | AC | 102 ms | 11904 KB |
1_107.txt | AC | 78 ms | 10368 KB |
1_108.txt | AC | 86 ms | 9344 KB |
1_109.txt | AC | 110 ms | 12800 KB |
1_110.txt | AC | 98 ms | 11392 KB |
1_111.txt | AC | 108 ms | 12800 KB |
1_112.txt | AC | 104 ms | 11904 KB |
1_113.txt | AC | 80 ms | 9088 KB |
1_114.txt | AC | 87 ms | 9344 KB |
1_115.txt | AC | 110 ms | 12800 KB |
1_116.txt | AC | 100 ms | 11392 KB |