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fix: clang-format for hamiltons_cycle. (#1054)

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Filip Hlasek 2020-08-27 07:31:34 -07:00 committed by GitHub
parent eee5f9495d
commit ea3071d52a
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1 changed files with 69 additions and 69 deletions
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138
graph/hamiltons_cycle.cpp
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@ -28,49 +28,49 @@
* @return `false` if there is no Hamiltonian cycle in the graph
*/
bool hamilton_cycle(const std::vector<std::vector<bool>> &routes) {
const size_t n = routes.size();
// height of dp array which is 2^n
const size_t height = 1 << n;
std::vector<std::vector<bool>> dp(height, std::vector<bool>(n, false));
const size_t n = routes.size();
// height of dp array which is 2^n
const size_t height = 1 << n;
std::vector<std::vector<bool>> dp(height, std::vector<bool>(n, false));
// to fill in the [2^i, i] cells with true
for (size_t i = 0; i < n; ++i) {
dp[1 << i][i] = true;
}
for (size_t i = 1; i < height; i++) {
std::vector<size_t> zeros, ones;
// finding positions with 1s and 0s and separate them
for (size_t pos = 0; pos < n; ++pos) {
if ((1 << pos) & i) {
ones.push_back(pos);
} else {
zeros.push_back(pos);
}
// to fill in the [2^i, i] cells with true
for (size_t i = 0; i < n; ++i) {
dp[1 << i][i] = true;
}
for (auto &o : ones) {
if (!dp[i][o]) {
continue;
}
for (auto &z : zeros) {
if (!routes[o][z]) {
continue;
for (size_t i = 1; i < height; i++) {
std::vector<size_t> zeros, ones;
// finding positions with 1s and 0s and separate them
for (size_t pos = 0; pos < n; ++pos) {
if ((1 << pos) & i) {
ones.push_back(pos);
} else {
zeros.push_back(pos);
}
}
dp[i + (1 << z)][z] = true;
}
}
}
bool is_cycle = false;
for (size_t i = 0; i < n; i++) {
is_cycle |= dp[height - 1][i];
if (is_cycle) { // if true, all subsequent loop will be true. hence
// break
break;
for (auto &o : ones) {
if (!dp[i][o]) {
continue;
}
for (auto &z : zeros) {
if (!routes[o][z]) {
continue;
}
dp[i + (1 << z)][z] = true;
}
}
}
}
return is_cycle;
bool is_cycle = false;
for (size_t i = 0; i < n; i++) {
is_cycle |= dp[height - 1][i];
if (is_cycle) { // if true, all subsequent loop will be true. hence
// break
break;
}
}
return is_cycle;
}
/**
@ -79,16 +79,16 @@ bool hamilton_cycle(const std::vector<std::vector<bool>> &routes) {
* @return None
*/
static void test1() {
std::vector<std::vector<bool>> arr{
std::vector<bool>({true, true, false, false}),
std::vector<bool>({false, true, true, false}),
std::vector<bool>({false, false, true, true}),
std::vector<bool>({false, false, false, true})};
std::vector<std::vector<bool>> arr{
std::vector<bool>({true, true, false, false}),
std::vector<bool>({false, true, true, false}),
std::vector<bool>({false, false, true, true}),
std::vector<bool>({false, false, false, true})};
bool ans = hamilton_cycle(arr);
std::cout << "Test 1... ";
assert(ans);
std::cout << "passed\n";
bool ans = hamilton_cycle(arr);
std::cout << "Test 1... ";
assert(ans);
std::cout << "passed\n";
}
/**
@ -101,17 +101,17 @@ static void test1() {
* @return None
*/
static void test2() {
std::vector<std::vector<bool>> arr{
std::vector<bool>({true, true, false, false}),
std::vector<bool>({false, true, true, true}),
std::vector<bool>({false, false, true, false}),
std::vector<bool>({false, false, false, true})};
std::vector<std::vector<bool>> arr{
std::vector<bool>({true, true, false, false}),
std::vector<bool>({false, true, true, true}),
std::vector<bool>({false, false, true, false}),
std::vector<bool>({false, false, false, true})};
bool ans = hamilton_cycle(arr);
bool ans = hamilton_cycle(arr);
std::cout << "Test 2... ";
assert(!ans); // not a cycle
std::cout << "passed\n";
std::cout << "Test 2... ";
assert(!ans); // not a cycle
std::cout << "passed\n";
}
/**
@ -120,17 +120,17 @@ static void test2() {
* @return None
*/
static void test3() {
std::vector<std::vector<bool>> arr{
std::vector<bool>({true, true, true, true}),
std::vector<bool>({true, true, true, true}),
std::vector<bool>({true, true, true, true}),
std::vector<bool>({true, true, true, true})};
std::vector<std::vector<bool>> arr{
std::vector<bool>({true, true, true, true}),
std::vector<bool>({true, true, true, true}),
std::vector<bool>({true, true, true, true}),
std::vector<bool>({true, true, true, true})};
bool ans = hamilton_cycle(arr);
bool ans = hamilton_cycle(arr);
std::cout << "Test 3... ";
assert(ans);
std::cout << "passed\n";
std::cout << "Test 3... ";
assert(ans);
std::cout << "passed\n";
}
/**
@ -140,8 +140,8 @@ static void test3() {
* @param argv commandline array of arguments (ignored)
*/
int main(int argc, char **argv) {
test1();
test2();
test3();
return 0;
test1();
test2();
test3();
return 0;
}