Add a few problems

Author: hir12111

beautifulmatrix.cpp

@@ -0,0 +1,25 @@
+#include <bits/stdc++.h>
+using namespace std;
+typedef long long ll;
+typedef pair<int, int> ii;
+typedef tuple<int, int, int> iii;
+typedef vector<ii > vii;
+typedef vector<iii > viii;
+
+int main()
+{
+    ios::sync_with_stdio(false);
+    int one_i, one_j, num;
+    for(int i=0;i<5;i++) {
+        for(int j=0;j<5;j++) {
+            cin >> num;
+            if (num == 1) {
+                one_i = i;
+                one_j = j;
+            }
+        }
+    }
+    int result = abs(2-one_i) + abs(2-one_j);
+    cout << result << endl;
+    return 0;
+}

beautifulyear.cpp

@@ -0,0 +1,29 @@
+#include <bits/stdc++.h>
+using namespace std;
+typedef long long ll;
+typedef pair<int, int> ii;
+typedef tuple<int, int, int> iii;
+typedef vector<ii > vii;
+typedef vector<iii > viii;
+
+bool is_beautiful(int year) {
+    bool digits[10] = {false};
+    while (year) {
+        int d = year % 10;
+        if (digits[d]) return false;
+        digits[d] = true;
+        year/=10;
+    }
+    return true;
+}
+
+int main()
+{
+    ios::sync_with_stdio(false);
+    int year;
+    cin >> year;
+    year++;
+    while(not is_beautiful(year)) year++;
+    cout << year << endl;
+    return 0;
+}

bitplusplus.cpp

@@ -0,0 +1,23 @@
+#include <bits/stdc++.h>
+using namespace std;
+typedef long long ll;
+typedef pair<int, int> ii;
+typedef tuple<int, int, int> iii;
+typedef vector<ii > vii;
+typedef vector<iii > viii;
+
+int main()
+{
+    ios::sync_with_stdio(false);
+    int n;
+    cin >> n;
+    int x = 0;
+    string input;
+    for(int i=0;i<n;i++) {
+        cin >> input;
+        if (input.find("++") != string::npos) x++;
+        else if (input.find("--") != string::npos) x--;
+    }
+    cout << x << endl;
+    return 0;
+}

bobbob.cpp

@@ -0,0 +1,15 @@
+#include <iostream>
+using namespace std;
+
+int main(int argc, char **argv)
+{
+    int tc;
+    cin >> tc;
+    while(tc--) {
+        int n, a, b, c, d;
+        cin >> n >> a >> b >> c >> d;
+        if (a+b+c+d > n/2) cout << "Yes" << endl;
+        else  cout << "No" << endl;
+    }
+    return 0;
+}

boyorgirl.cpp

@@ -0,0 +1,27 @@
+#include <bits/stdc++.h>
+using namespace std;
+typedef long long ll;
+typedef pair<int, int> ii;
+typedef tuple<int, int, int> iii;
+typedef vector<ii > vii;
+typedef vector<iii > viii;
+
+bool  carset['z'-'a'+1];
+int main()
+{
+    ios::sync_with_stdio(false);
+    string input;
+    cin >> input;
+    for (char c : input)
+        carset[c-'a'] = true;
+    int res=0;
+    for(int i=0;i<'z'-'a'+1;i++) {
+        res += (int) carset[i];
+    }
+    if (res % 2)
+        cout << "IGNORE HIM!" << endl;
+    else
+        cout << "CHAT WITH HER!" << endl;
+
+    return 0;
+}

capslock.cpp

@@ -0,0 +1,42 @@
+#include <bits/stdc++.h>
+using namespace std;
+typedef long long ll;
+typedef pair<int, int> ii;
+typedef tuple<int, int, int> iii;
+typedef vector<ii > vii;
+typedef vector<iii > viii;
+
+bool is_error(string input) {
+    assert(input.size() > 1);
+    for(int i=1;i<(int)input.size();i++) {
+        char c = input[i];
+        if (not (c >= 'A' && c <= 'Z'))
+            return false;
+    }
+    return true;
+}
+char toggle(char c) {
+    if (c >= 'A' && c <= 'Z')
+        return tolower(c);
+    if (c >= 'a' && c <= 'z')
+        return toupper(c);
+    return c;
+}
+int main()
+{
+    ios::sync_with_stdio(false);
+    string input;
+    cin >> input;
+    if (input.size() == 1) {
+        cout << (char) toggle(input[0]) << endl;
+        return 0;
+    }
+    if (is_error(input)) {
+        transform(input.begin()+1, input.end(), input.begin()+1,
+                [](char c) -> char { return tolower(c); });
+        input[0] = toggle(input[0]);
+    }
+    cout << input << endl;
+
+    return 0;
+}

chatroom.cpp

@@ -0,0 +1,25 @@
+#include <bits/stdc++.h>
+using namespace std;
+typedef long long ll;
+typedef pair<int, int> ii;
+typedef tuple<int, int, int> iii;
+typedef vector<ii > vii;
+typedef vector<iii > viii;
+
+int main()
+{
+    ios::sync_with_stdio(false);
+    string input;
+    string test = "hello";
+    int i=0;
+    cin >> input;
+    for(char c : input) {
+        if (test[i] == c) {
+            i++;
+            if (i>= test.size()) break;
+        }
+    }
+    if (i>=test.size()) cout << "YES" << endl;
+    else                cout << "NO" << endl;
+    return 0;
+}

dominopiling.cpp

@@ -0,0 +1,21 @@
+#include <bits/stdc++.h>
+using namespace std;
+typedef long long ll;
+typedef pair<int, int> ii;
+typedef tuple<int, int, int> iii;
+typedef vector<ii > vii;
+typedef vector<iii > viii;
+
+int main()
+{
+    ios::sync_with_stdio(false);
+    int m, n;
+    cin >> m >> n;
+    if (m==1 && n==1) {
+        cout << 0 << endl;
+        return 0;
+    }
+    int res = m*n/2;
+    cout << res << endl;
+    return 0;
+}

football.cpp

@@ -0,0 +1,32 @@
+#include <bits/stdc++.h>
+using namespace std;
+typedef long long ll;
+typedef pair<int, int> ii;
+typedef tuple<int, int, int> iii;
+typedef vector<ii > vii;
+typedef vector<iii > viii;
+
+int main()
+{
+    ios::sync_with_stdio(false);
+    string input;
+    cin >> input;
+    int first = 0;
+    int second = 0;
+    for(auto c : input) {
+        if (c=='0') {
+            first++;
+            second = 0;
+        } else {
+            second++;
+            first = 0;
+        }
+        if (first >= 7 || second >= 7) {
+            cout << "YES" << endl;
+            return 0;
+        }
+    }
+    cout << "NO" << endl;
+
+    return 0;
+}

georgeandaccomodation.cpp

@@ -0,0 +1,22 @@
+#include <bits/stdc++.h>
+using namespace std;
+typedef long long ll;
+typedef pair<int, int> ii;
+typedef tuple<int, int, int> iii;
+typedef vector<ii > vii;
+typedef vector<iii > viii;
+
+int main()
+{
+    ios::sync_with_stdio(false);
+    int n;
+    cin >> n;
+    int a, b;
+    int res = 0;
+    for(int i=0;i<n;i++) {
+        cin >> a >> b;
+        if (b-a >= 2) res++;
+    }
+    cout << res << endl;
+    return 0;
+}

helpfulmath.cpp

@@ -0,0 +1,22 @@
+#include <bits/stdc++.h>
+using namespace std;
+typedef long long ll;
+typedef pair<int, int> ii;
+typedef tuple<int, int, int> iii;
+typedef vector<ii > vii;
+typedef vector<iii > viii;
+
+int main()
+{
+    ios::sync_with_stdio(false);
+    string input;
+    cin >> input;
+    sort(input.begin(), input.end());
+    for(int i=input.size()/2;i<input.size()-1;i++) {
+        cout << input[i] << "+";
+    }
+    cout << input[input.size()-1] << endl;
+
+
+    return 0;
+}

hqmplus.cpp

@@ -0,0 +1,22 @@
+#include <bits/stdc++.h>
+using namespace std;
+typedef long long ll;
+typedef pair<int, int> ii;
+typedef tuple<int, int, int> iii;
+typedef vector<ii > vii;
+typedef vector<iii > viii;
+
+int main()
+{
+    ios::sync_with_stdio(false);
+    string input;
+    cin >> input;
+    for (char c : input) {
+        if (c=='Q' || c=='H' || c=='9') {
+            cout << "YES" << endl;
+            return 0;
+        }
+    }
+    cout << "NO" << endl;
+    return 0;
+}

kefaandfirststeps.cpp

@@ -0,0 +1,27 @@
+#include <bits/stdc++.h>
+using namespace std;
+typedef long long ll;
+typedef pair<int, int> ii;
+typedef tuple<int, int, int> iii;
+typedef vector<ii > vii;
+typedef vector<iii > viii;
+int arr[100001];
+int m[100001];
+int main()
+{
+    ios::sync_with_stdio(false);
+    int n;
+    cin >> n;
+    for(int i=0;i<n;i++) {
+        cin >> arr[i];
+    }
+    int result=1;
+    int count=1;
+    for(int i=1;i<n;i++) {
+        if(arr[i] >= arr[i-1]) count++;
+        else                   count=1;
+        result = max(result, count);
+    }
+    cout << result << endl;
+    return 0;
+}

luckydivision.cpp

@@ -0,0 +1,33 @@
+#include <bits/stdc++.h>
+using namespace std;
+typedef long long ll;
+typedef pair<int, int> ii;
+typedef tuple<int, int, int> iii;
+typedef vector<ii > vii;
+typedef vector<iii > viii;
+
+bool is_lucky(int x) {
+    while(x) {
+        if (x%10 != 4 && x%10 != 7) return false;
+        x /= 10;
+    }
+    return true;
+}
+int main()
+{
+    ios::sync_with_stdio(false);
+    int n;
+    cin >> n;
+    if (is_lucky(n)) {
+        cout << "YES" << endl;
+        return 0;
+    }
+    for(int i=4;i<=(n/2);i++) {
+        if (n%i==0 && is_lucky(i)) {
+            cout << "YES" << endl;
+            return 0;
+        }
+    }
+    cout << "NO" << endl;
+    return 0;
+}