Created
July 12, 2017 19:15
-
-
Save Izaron/43c521e5597550029de928c5fb8f3ef9 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#include <bits/stdc++.h> | |
using namespace std; | |
vector<string> crop(string& s) { | |
vector<string> vec; | |
string cur = ""; | |
for (int i = 0; i < (int) s.size(); i++) { | |
if (s[i] < 'a' || s[i] > 'z') { | |
// if s[i] is not a lowercase english letter | |
if (!cur.empty()) { | |
vec.push_back(cur); | |
cur = ""; | |
} | |
} else { | |
cur.push_back(s[i]); | |
} | |
} | |
return vec; | |
} | |
bool solve() { | |
int n; | |
cin >> n; | |
vector<string> sources(n); // source lines | |
map<string, int> indexes; // map of "variable name" -> "index" | |
vector< vector<string> > deps_raw(n); // list of dependencies (as variable string) | |
vector< set<int> > deps(n); // list of dependencies (as indexes) | |
for (int i = 0; i < n; i++) { | |
string s; | |
cin >> s; | |
sources[i] = s; | |
vector<string> variables = crop(s); | |
string name = variables[0]; | |
indexes[name] = i; | |
vector<string> var_names; | |
for (int z = 2; z < (int) variables.size(); z++) | |
var_names.push_back(variables[z]); | |
deps_raw[i] = var_names; | |
} | |
for (int i = 0; i < n; i++) { | |
for (auto dep : deps_raw[i]) { | |
if (!indexes.count(dep)) | |
return false; | |
} | |
} | |
for (int i = 0; i < n; i++) { | |
set<int> deps_set; | |
for (auto dep : deps_raw[i]) | |
deps_set.insert(indexes[dep]); | |
deps[i] = deps_set; | |
} | |
// main loop here! | |
vector<bool> used(n); | |
for (int count = 0; count < n; count++) { | |
int v = -1; | |
for (int i = 0; i < n; i++) { | |
if (used[i]) | |
continue; | |
if (deps[i].empty()) { | |
v = i; | |
break; | |
} | |
} | |
if (v == -1) | |
return false; | |
cerr << count << "-th line: " << sources[v] << endl; | |
used[v] = true; | |
for (int i = 0; i < n; i++) { | |
if (!used[i]) { | |
if (deps[i].count(v)) | |
deps[i].erase(v); | |
} | |
} | |
} | |
return true; | |
} | |
int main(int argc, char *argv[]) { | |
int t; | |
cin >> t; | |
for (int i = 0; i < t; i++) { | |
cout << "Case #" << i + 1 << ": "; | |
cerr << "Test #" << i + 1 << endl; | |
cout << (solve() ? "GOOD" : "BAD") << endl; | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment