Submission #1869923
Source Code Expand
#include <algorithm> #include <iostream> #include <cstring> #include <cstdio> #include <vector> 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 = 200000; const int INF = 0x3f3f3f3f; int n; char s[MaxN + 1]; vector<int> adj[MaxN + 1]; int dep[MaxN + 1][3]; int sum[MaxN + 1]; s64 res = 1ll; int dfs1(const int &u, const int &fa) { sum[u] = s[u] == '1'; dep[u][0] = s[u] == '1' ? 0 : INF; for (int v : adj[u]) if (v != fa) { sum[u] += dfs1(v, u); int d = dep[v][1] + 1; if (d > dep[u][1]) dep[u][2] = dep[u][1], dep[u][1] = d; else if (d > dep[u][2]) dep[u][2] = d; if (sum[v] > 0) dep[u][0] = min(dep[u][0], d); } return sum[u]; } void dfs2(const int &u, const int &fa) { for (int v : adj[u]) if (v != fa) { int d = dep[u][dep[v][1] + 1 == dep[u][1] ? 2 : 1] + 1; if (d > dep[v][1]) dep[v][2] = dep[v][1], dep[v][1] = d; else if (d > dep[v][2]) dep[v][2] = d; if (sum[v] < sum[1]) dep[v][0] = min(dep[v][0], d); dfs2(v, u); } int up = min(dep[u][1] - 1, dep[u][2] + 1); if (up >= dep[u][0]) res += up - dep[u][0] + 1; } int main() { cin >> n; for (int i = 1; i < n; ++i) { int u = getint(), v = getint(); adj[u].push_back(v); adj[v].push_back(u); } scanf("%s", s + 1); dfs1(1, 0); dfs2(1, 0); cout << res << endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | F - Black Radius |
User | InvUsr |
Language | C++14 (GCC 5.4.1) |
Score | 1900 |
Code Size | 1631 Byte |
Status | AC |
Exec Time | 107 ms |
Memory | 24064 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:89:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s + 1); ^
Judge Result
Set Name | Sample | Subtask | All | ||||||
---|---|---|---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 1300 / 1300 | 600 / 600 | ||||||
Status |
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Set Name | Test Cases |
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Sample | 0_00.txt, 0_01.txt, 0_02.txt |
Subtask | 0_01.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 |
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, 2_00.txt, 2_01.txt, 2_02.txt, 2_03.txt, 2_04.txt, 2_05.txt, 2_06.txt, 2_07.txt, 2_08.txt, 2_09.txt, 2_10.txt, 2_11.txt, 2_12.txt, 2_13.txt, 2_14.txt, 2_15.txt, 2_16.txt, 2_17.txt, 2_18.txt, 2_19.txt, 2_20.txt, 2_21.txt, 2_22.txt, 2_23.txt, 2_24.txt, 2_25.txt, 2_26.txt, 2_27.txt, 2_28.txt, 2_29.txt, 2_30.txt, 2_31.txt, 2_32.txt, 2_33.txt, 2_34.txt, 2_35.txt, 2_36.txt, 2_37.txt, 2_38.txt, 2_39.txt, 2_40.txt, 2_41.txt, 2_42.txt, 2_43.txt, 2_44.txt, 2_45.txt, 2_46.txt, 2_47.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
0_00.txt | AC | 3 ms | 6016 KB |
0_01.txt | AC | 3 ms | 6016 KB |
0_02.txt | AC | 3 ms | 6016 KB |
1_00.txt | AC | 3 ms | 6016 KB |
1_01.txt | AC | 102 ms | 24064 KB |
1_02.txt | AC | 94 ms | 20608 KB |
1_03.txt | AC | 95 ms | 14592 KB |
1_04.txt | AC | 67 ms | 14840 KB |
1_05.txt | AC | 49 ms | 15348 KB |
1_06.txt | AC | 74 ms | 14720 KB |
1_07.txt | AC | 76 ms | 14720 KB |
1_08.txt | AC | 78 ms | 15488 KB |
1_09.txt | AC | 86 ms | 19328 KB |
1_10.txt | AC | 82 ms | 18560 KB |
1_11.txt | AC | 92 ms | 23936 KB |
1_12.txt | AC | 77 ms | 16640 KB |
1_13.txt | AC | 91 ms | 18944 KB |
1_14.txt | AC | 79 ms | 16512 KB |
1_15.txt | AC | 78 ms | 15616 KB |
1_16.txt | AC | 93 ms | 17152 KB |
1_17.txt | AC | 92 ms | 18304 KB |
1_18.txt | AC | 84 ms | 14592 KB |
1_19.txt | AC | 76 ms | 14592 KB |
1_20.txt | AC | 79 ms | 14592 KB |
1_21.txt | AC | 79 ms | 15232 KB |
1_22.txt | AC | 68 ms | 14844 KB |
1_23.txt | AC | 81 ms | 14716 KB |
1_24.txt | AC | 77 ms | 15360 KB |
1_25.txt | AC | 70 ms | 16248 KB |
1_26.txt | AC | 68 ms | 14588 KB |
1_27.txt | AC | 65 ms | 14968 KB |
1_28.txt | AC | 59 ms | 15352 KB |
1_29.txt | AC | 80 ms | 16892 KB |
2_00.txt | AC | 3 ms | 6016 KB |
2_01.txt | AC | 107 ms | 23680 KB |
2_02.txt | AC | 91 ms | 22144 KB |
2_03.txt | AC | 99 ms | 21760 KB |
2_04.txt | AC | 98 ms | 19072 KB |
2_05.txt | AC | 89 ms | 19200 KB |
2_06.txt | AC | 90 ms | 19968 KB |
2_07.txt | AC | 78 ms | 14592 KB |
2_08.txt | AC | 80 ms | 14592 KB |
2_09.txt | AC | 81 ms | 14592 KB |
2_10.txt | AC | 64 ms | 14840 KB |
2_11.txt | AC | 68 ms | 14840 KB |
2_12.txt | AC | 63 ms | 14840 KB |
2_13.txt | AC | 52 ms | 15348 KB |
2_14.txt | AC | 48 ms | 15348 KB |
2_15.txt | AC | 51 ms | 15348 KB |
2_16.txt | AC | 74 ms | 14720 KB |
2_17.txt | AC | 74 ms | 14720 KB |
2_18.txt | AC | 74 ms | 14720 KB |
2_19.txt | AC | 74 ms | 14720 KB |
2_20.txt | AC | 76 ms | 14720 KB |
2_21.txt | AC | 75 ms | 14720 KB |
2_22.txt | AC | 77 ms | 15360 KB |
2_23.txt | AC | 78 ms | 15872 KB |
2_24.txt | AC | 82 ms | 15744 KB |
2_25.txt | AC | 83 ms | 19712 KB |
2_26.txt | AC | 82 ms | 18688 KB |
2_27.txt | AC | 85 ms | 19584 KB |
2_28.txt | AC | 79 ms | 18304 KB |
2_29.txt | AC | 98 ms | 22528 KB |
2_30.txt | AC | 88 ms | 21120 KB |
2_31.txt | AC | 89 ms | 18304 KB |
2_32.txt | AC | 76 ms | 14976 KB |
2_33.txt | AC | 82 ms | 16640 KB |
2_34.txt | AC | 83 ms | 18048 KB |
2_35.txt | AC | 88 ms | 20096 KB |
2_36.txt | AC | 77 ms | 14464 KB |
2_37.txt | AC | 79 ms | 14592 KB |
2_38.txt | AC | 77 ms | 15488 KB |
2_39.txt | AC | 85 ms | 14720 KB |
2_40.txt | AC | 67 ms | 14840 KB |
2_41.txt | AC | 72 ms | 14720 KB |
2_42.txt | AC | 63 ms | 14712 KB |
2_43.txt | AC | 92 ms | 19200 KB |
2_44.txt | AC | 62 ms | 14840 KB |
2_45.txt | AC | 55 ms | 15096 KB |
2_46.txt | AC | 55 ms | 15348 KB |
2_47.txt | AC | 74 ms | 17400 KB |