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#include <iostream>

using namespace std;

 

int T, N, K, arr[105], maxRes;

 

void updateState(int k) {

int tmp = k, n = 0;

while (tmp <= N) {

tmp = k + (n * (k + 1));

n++;

if (arr[tmp] == 0) arr[tmp] = 1;

else arr[tmp] = 0;

}

}

 

void backtracking(int cnt) {

if (cnt == 3) {

int cnt = 0;

for (int i = 1; i <= N; i++) {

if (arr[i] == 0) cnt++;

}

maxRes = maxRes > cnt ? maxRes : cnt;

return;

}

 

for (int i = 1; i <= K; i++) {

updateState(i);

backtracking(cnt + 1);

updateState(i);

}

}

 

int main() {

//freopen("input.txt", "r", stdin);

cin >> T;

 

for (int t = 1; t <= T; t++) {

cin >> N >> K;

for (int i = 1; i <= N; i++) {

cin >> arr[i];

}

 

//

maxRes = -1;

backtracking(0);

cout << "#" << t << " " << maxRes << endl;

}

 

return 0;

}

Success #stdin #stdout 0.01s 5280KB

 comments (0)

 stdin

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 stdout

#1 59 

https://ideone.com/K1UZQI

language:

C++ (gcc 8.3)

created:

23 hours ago

visibility:

 secret


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#include <iostream>

using namespace std;

 

int T, N, K, arr[105], maxRes;

 

void updateState(int k) {

int tmp = k, n = 0;

while (tmp <= N) {

tmp = k + (n * (k + 1));

n++;

if (arr[tmp] == 0) arr[tmp] = 1;

else arr[tmp] = 0;

}

}

 

void backtracking(int cnt) {

if (cnt == 3) {

int cnt = 0;

for (int i = 1; i <= N; i++) {

if (arr[i] == 0) cnt++;

}

maxRes = maxRes > cnt ? maxRes : cnt;

return;

}

 

for (int i = 1; i <= K; i++) {

updateState(i);

backtracking(cnt + 1);

updateState(i);

}

}

 

int main() {

//freopen("input.txt", "r", stdin);

cin >> T;

 

for (int t = 1; t <= T; t++) {

cin >> N >> K;

for (int i = 1; i <= N; i++) {

cin >> arr[i];

}

 

//

maxRes = -1;

backtracking(0);

cout << "#" << t << " " << maxRes << endl;

}

 

return 0;

}

Success #stdin #stdout 0.01s 5280KB

 comments (0)

 stdin

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fork download #include <iostream> using namespace std;   int T, N, K, arr[105], maxRes;   void updateState(int k) { int tmp = k, n = 0; while (tmp <= N) { tmp = k + (n * (k + 1)); n++; if (arr[tmp] == 0) arr[tmp] = 1; else arr[tmp] = 0; } }   void backtracking(int cnt) { if (cnt == 3) { int cnt = 0; for (int i = 1; i <= N; i++) { if (arr[i] == 0) cnt++; } maxRes = maxRes > cnt ? maxRes : cnt; return; }   for (int i = 1; i <= K; i++) { updateState(i); backtracking(cnt + 1); updateState(i); } }   int main() { //freopen("input.txt", "r", stdin); cin >> T;   for (int t = 1; t <= T; t++) { cin >> N >> K; for (int i = 1; i <= N; i++) { cin >> arr[i]; }   // maxRes = -1; backtracking(0); cout << "#" << t << " " << maxRes << endl; }   return 0; } Success #stdin #stdout 0.01s 5280KB comments (0) stdin 500 100 9 0 0 1 0 1 1 0 1 0 0 1 1 1 1 0 1 1 1 0 1 1 1 0 1 1 0 1 0 0 0 1 0 1 0 1 1 0 1 1 0 0 1 1 0 1 0 1 1 0 1 0 1 1 0 1 1 1 1 1 0 1 0 1 1 0 1 0 1 1 0 1 0 1 0 0 0 1 1 1 1 1 0 0 0 0 1 0 1 0 1 1 0 1 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