Submission #3712500
Source Code Expand
#include <cstdio> #include <cstring> #include <algorithm> #define ll long long #define MOD 1000000007 //define ll X; int n, m; struct Data{ int x, y, v; bool operator<(const Data a)const{ return v < a.v; } }d[2333]; void input(){ scanf("%d %d", &n, &m); scanf("%lld", &X); for(int i = 1; i <= m; i++) scanf("%d %d %d", &d[i].x, &d[i].y, &d[i].v); std::sort(d + 1, d + m + 1); } //work ll ans; int fa[1111]; int ls, mr, eq; int find(int a){ if(fa[a] == a) return a; return fa[a] = find(fa[a]); } void Kruskal(int a){ ans = 0; for(int i = 1; i <= n; i++) fa[i] = i; ans = ans + d[a].v; fa[d[a].x] = d[a].y; for(int i = 1; i <= m; i++){ if(i == a) continue; int u = d[i].x, v = d[i].y; if(find(u) == find(v)) continue; fa[find(u)] = find(v); ans = ans + d[i].v; } if(ans < X) ls++; if(ans == X) eq++; if(ans > X) mr++; } int p[1111]; int Ans; void work(){ p[0] = 1; for(int i = 1; i <= n; i++) p[i] = p[i - 1] * 2 % MOD; for(int i = 1; i <= m; i++) Kruskal(i); if(eq == 0) puts("0"); else if(ls == 0) printf("%lld\n", 1ll * ((p[eq] - 2 + MOD) % MOD) * p[mr] % MOD); else printf("%lld\n", 1ll * 2 * ((p[eq] - 1 + MOD) % MOD) * p[mr] % MOD); } int main(){ input(); work(); return 0; }
Submission Info
Submission Time | |
---|---|
Task | E - Bichrome Spanning Tree |
User | Trestrals |
Language | C++14 (GCC 5.4.1) |
Score | 0 |
Code Size | 1302 Byte |
Status | WA |
Exec Time | 71 ms |
Memory | 256 KB |
Compile Error
./Main.cpp: In function ‘void input()’: ./Main.cpp:18:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ ./Main.cpp:19:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld", &X); ^ ./Main.cpp:21:47: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &d[i].x, &d[i].y, &d[i].v); ^
Judge Result
Set Name | Sample | All | ||||||
---|---|---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 0 / 900 | ||||||
Status |
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Set Name | Test Cases |
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Sample | sample-01.txt, sample-02.txt, sample-03.txt, sample-04.txt |
All | 01.txt, 02.txt, 03.txt, 04.txt, 05.txt, 06.txt, 07.txt, 08.txt, 09.txt, 10.txt, 11.txt, 12.txt, 13.txt, 14.txt, 15.txt, 16.txt, 17.txt, 18.txt, 19.txt, 20.txt, 21.txt, 22.txt, 23.txt, 24.txt, 25.txt, 26.txt, 27.txt, 28.txt, 29.txt, 30.txt, 31.txt, 32.txt, 33.txt, 34.txt, 35.txt, 36.txt, 37.txt, 38.txt, 39.txt, 40.txt, 41.txt, 42.txt, 43.txt, 44.txt, 45.txt, 46.txt, 47.txt, 48.txt, sample-01.txt, sample-02.txt, sample-03.txt, sample-04.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
01.txt | AC | 58 ms | 256 KB |
02.txt | AC | 66 ms | 256 KB |
03.txt | AC | 49 ms | 256 KB |
04.txt | AC | 49 ms | 256 KB |
05.txt | AC | 45 ms | 256 KB |
06.txt | AC | 59 ms | 256 KB |
07.txt | AC | 49 ms | 256 KB |
08.txt | AC | 71 ms | 256 KB |
09.txt | AC | 59 ms | 256 KB |
10.txt | AC | 46 ms | 256 KB |
11.txt | AC | 54 ms | 256 KB |
12.txt | AC | 9 ms | 128 KB |
13.txt | AC | 8 ms | 128 KB |
14.txt | AC | 12 ms | 128 KB |
15.txt | WA | 69 ms | 256 KB |
16.txt | AC | 49 ms | 256 KB |
17.txt | WA | 60 ms | 256 KB |
18.txt | AC | 57 ms | 256 KB |
19.txt | AC | 46 ms | 256 KB |
20.txt | AC | 49 ms | 256 KB |
21.txt | WA | 58 ms | 256 KB |
22.txt | AC | 45 ms | 256 KB |
23.txt | AC | 50 ms | 256 KB |
24.txt | AC | 10 ms | 128 KB |
25.txt | AC | 10 ms | 128 KB |
26.txt | AC | 52 ms | 256 KB |
27.txt | AC | 61 ms | 256 KB |
28.txt | AC | 53 ms | 256 KB |
29.txt | AC | 49 ms | 256 KB |
30.txt | AC | 56 ms | 256 KB |
31.txt | AC | 49 ms | 256 KB |
32.txt | AC | 52 ms | 256 KB |
33.txt | AC | 53 ms | 256 KB |
34.txt | AC | 43 ms | 256 KB |
35.txt | WA | 29 ms | 256 KB |
36.txt | WA | 29 ms | 256 KB |
37.txt | WA | 29 ms | 256 KB |
38.txt | AC | 62 ms | 256 KB |
39.txt | AC | 52 ms | 256 KB |
40.txt | AC | 49 ms | 256 KB |
41.txt | AC | 61 ms | 256 KB |
42.txt | AC | 22 ms | 128 KB |
43.txt | AC | 11 ms | 128 KB |
44.txt | AC | 9 ms | 128 KB |
45.txt | AC | 16 ms | 128 KB |
46.txt | AC | 25 ms | 128 KB |
47.txt | AC | 10 ms | 128 KB |
48.txt | AC | 14 ms | 128 KB |
sample-01.txt | AC | 1 ms | 128 KB |
sample-02.txt | AC | 1 ms | 128 KB |
sample-03.txt | AC | 1 ms | 128 KB |
sample-04.txt | AC | 1 ms | 128 KB |