Submission #1774841
Source Code Expand
#include<bits/stdc++.h> using namespace std; typedef pair<int, int> P; const int M = 1000000007; int main() { int n, m, s, t; cin >> n >> m >> s >> t; --s; --t; vector<vector<int>> edge(n); for (int i = 0; i < m; ++i) { int a, b; scanf("%d%d", &a, &b); --a; --b; edge[a].push_back(b); edge[b].push_back(a); } vector<int> ds(n, -1); vector<int> cs(n, 0); queue<int> q; q.push(s); ds[s] = 0; ++cs[0]; while (!q.empty()) { int p = q.front(); q.pop(); for (int i : edge[p]) { if (ds[i] == -1) { ds[i] = ds[p] + 1; ++cs[ds[i]]; q.push(i); } } } vector<int> dt(n, -1); vector<int> ct(n, 0); q.push(t); dt[t] = 0; ++ct[0]; while (!q.empty()) { int p = q.front(); q.pop(); for (int i : edge[p]) { if (dt[i] == -1) { dt[i] = dt[p] + 1; ++ct[dt[i]]; q.push(i); } } } int l = ds[t] - 1; long long ans = 0; for (int i = 0; i <= l; ++i) { ans += cs[i] * (long long)ct[l - i - 1]; } cout << ans << "\n"; return 0; }
Submission Info
Submission Time | |
---|---|
Task | B - Minus One |
User | riantkb |
Language | C++14 (GCC 5.4.1) |
Score | 100 |
Code Size | 1340 Byte |
Status | AC |
Exec Time | 62 ms |
Memory | 8312 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:14:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &a, &b); ^
Judge Result
Set Name | All | ||
---|---|---|---|
Score / Max Score | 100 / 100 | ||
Status |
|
Set Name | Test Cases |
---|---|
All | 00-sample1.txt, 00-sample2.txt, 00-sample4.txt, 50-random10.txt, 50-random11.txt, 50-random12.txt, 50-random13.txt, 50-random14.txt, 50-random15.txt, 50-random16.txt, 50-random17.txt, 50-random18.txt, 50-random19.txt, 50-random20.txt, 50-random21.txt, 50-random22.txt, 50-random23.txt, 50-random24.txt, 50-random25.txt, 50-random26.txt, 50-random27.txt, 50-random28.txt, 50-random29.txt, 50-random30.txt, 50-random31.txt, 50-random32.txt, 50-random33.txt, 50-random34.txt, 50-random35.txt, 50-random36.txt, 50-random37.txt, 50-random38.txt, 50-random39.txt, 50-random40.txt, 50-random41.txt, 50-random42.txt, 50-random43.txt, 50-random44.txt, 50-random45.txt, 50-random46.txt, 50-random47.txt, 50-random48.txt, 50-random49.txt, 50-random50.txt, 50-random51.txt, 50-random52.txt, 50-random53.txt, 50-random54.txt, 50-random55.txt, 50-random56.txt, 50-random57.txt, 50-random58.txt, 50-random59.txt, 50-random60.txt, 50-random61.txt, 50-random62.txt, 50-random63.txt, 50-random64.txt, 50-random65.txt, 50-random66.txt, 50-random67.txt, 50-random68.txt, 50-random69.txt, intoverflow00.txt, intoverflow01.txt, intoverflow02.txt, intoverflow03.txt, intoverflow04.txt, intoverflow05.txt, intoverflow06.txt, intoverflow07.txt, intoverflow08.txt, intoverflow09.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
00-sample1.txt | AC | 1 ms | 256 KB |
00-sample2.txt | AC | 1 ms | 256 KB |
00-sample4.txt | AC | 1 ms | 256 KB |
50-random10.txt | AC | 1 ms | 256 KB |
50-random11.txt | AC | 1 ms | 256 KB |
50-random12.txt | AC | 1 ms | 256 KB |
50-random13.txt | AC | 1 ms | 256 KB |
50-random14.txt | AC | 1 ms | 256 KB |
50-random15.txt | AC | 1 ms | 256 KB |
50-random16.txt | AC | 1 ms | 256 KB |
50-random17.txt | AC | 1 ms | 256 KB |
50-random18.txt | AC | 1 ms | 256 KB |
50-random19.txt | AC | 1 ms | 256 KB |
50-random20.txt | AC | 1 ms | 256 KB |
50-random21.txt | AC | 1 ms | 256 KB |
50-random22.txt | AC | 1 ms | 256 KB |
50-random23.txt | AC | 1 ms | 256 KB |
50-random24.txt | AC | 1 ms | 256 KB |
50-random25.txt | AC | 1 ms | 256 KB |
50-random26.txt | AC | 1 ms | 256 KB |
50-random27.txt | AC | 1 ms | 256 KB |
50-random28.txt | AC | 1 ms | 256 KB |
50-random29.txt | AC | 1 ms | 256 KB |
50-random30.txt | AC | 1 ms | 256 KB |
50-random31.txt | AC | 1 ms | 256 KB |
50-random32.txt | AC | 1 ms | 256 KB |
50-random33.txt | AC | 1 ms | 256 KB |
50-random34.txt | AC | 1 ms | 256 KB |
50-random35.txt | AC | 1 ms | 256 KB |
50-random36.txt | AC | 1 ms | 256 KB |
50-random37.txt | AC | 1 ms | 256 KB |
50-random38.txt | AC | 1 ms | 256 KB |
50-random39.txt | AC | 1 ms | 256 KB |
50-random40.txt | AC | 2 ms | 384 KB |
50-random41.txt | AC | 1 ms | 256 KB |
50-random42.txt | AC | 2 ms | 256 KB |
50-random43.txt | AC | 1 ms | 256 KB |
50-random44.txt | AC | 2 ms | 256 KB |
50-random45.txt | AC | 1 ms | 256 KB |
50-random46.txt | AC | 2 ms | 256 KB |
50-random47.txt | AC | 2 ms | 256 KB |
50-random48.txt | AC | 2 ms | 256 KB |
50-random49.txt | AC | 2 ms | 384 KB |
50-random50.txt | AC | 3 ms | 640 KB |
50-random51.txt | AC | 7 ms | 896 KB |
50-random52.txt | AC | 3 ms | 384 KB |
50-random53.txt | AC | 6 ms | 1024 KB |
50-random54.txt | AC | 7 ms | 1024 KB |
50-random55.txt | AC | 8 ms | 1024 KB |
50-random56.txt | AC | 2 ms | 256 KB |
50-random57.txt | AC | 4 ms | 768 KB |
50-random58.txt | AC | 3 ms | 640 KB |
50-random59.txt | AC | 3 ms | 512 KB |
50-random60.txt | AC | 39 ms | 4736 KB |
50-random61.txt | AC | 38 ms | 4352 KB |
50-random62.txt | AC | 61 ms | 6016 KB |
50-random63.txt | AC | 39 ms | 4224 KB |
50-random64.txt | AC | 42 ms | 5120 KB |
50-random65.txt | AC | 15 ms | 2048 KB |
50-random66.txt | AC | 14 ms | 2688 KB |
50-random67.txt | AC | 6 ms | 2816 KB |
50-random68.txt | AC | 5 ms | 768 KB |
50-random69.txt | AC | 4 ms | 1920 KB |
intoverflow00.txt | AC | 61 ms | 8312 KB |
intoverflow01.txt | AC | 59 ms | 8308 KB |
intoverflow02.txt | AC | 59 ms | 8304 KB |
intoverflow03.txt | AC | 59 ms | 8312 KB |
intoverflow04.txt | AC | 61 ms | 8308 KB |
intoverflow05.txt | AC | 62 ms | 8308 KB |
intoverflow06.txt | AC | 59 ms | 8308 KB |
intoverflow07.txt | AC | 60 ms | 8312 KB |
intoverflow08.txt | AC | 61 ms | 8312 KB |
intoverflow09.txt | AC | 60 ms | 8312 KB |