最小位数和

#include <iostream>
#include <string>

using namespace std;

string fun(int number) {
    string str = "";
    if(number < 10) {
        return (char)(number + '0') + str;
    }
    while (number) {
        if(number > 9) {
            str = '9' + str;
            number -= 9;
        } else {
            str = (char)(number + '0') + str;
            number = 0;
        }
    }
    return str;
}

int main() {
    int n;
    cin >> n;
    while(n--) {
        int temp;
        cin >> temp;
        cout << fun(temp) << endl;
    }
    return 0;
} 

翻倍

#include <iostream>

using namespace std;

int main() {
    int T;
    cin >> T;
    while(T--) {
        long long A, B, p, q;
        cin >> A >> B >> p >> q;
        if(A + p > B) {
            cout << 1 << endl;
        } else {
            int num = 1;
            while(A + p < B) {
                p *= q;
                num ++;
            }
            cout << num << endl;
        }
    }
    return 0;
}

跳柱子

#include <iostream>

using namespace std;

int main() {
    int T;
    cin >> T;
    while(T--) {
        int n, k;
        cin >> n >> k;
        int sign = 1;
        int success = 1;
        int arr[1005];
        for(int i = 0; i < n; i ++) {
            cin >> arr[i];
        }
        for(int i = 0; i < n - 1;) {
            int maxIndex = i, max = 0;
            for(int j = 1; j <= k; j++) {
                if(i + j >= n) {
                    break;
                }
                if(arr[i + j] <= arr[i] && arr[i + j] >= max) {
                    max = arr[i + j];
                    maxIndex = i + j; 
                }
            }
            if(max == 0) {
                if(sign == 1) {
                    sign = 0;
                    for(int j = 1; j <= k; j++) {
                        if(i + j >= n) {
                            break;
                        }
                        if(arr[i + j] > max) {
                            max = arr[i + j];
                            maxIndex = i + j; 
                        }
                    }
                    i = maxIndex;
                } else {
                    success = 0;
                    break; 
                }
            } else {
                i = maxIndex;
            }
        }
        if (success == 1) {
            printf("YES\n");
        } else {
            printf("NO\n");
        }
    }
    return 0;
}

积木

#include <iostream>

using namespace std;

int main() {
    int T;
    cin >> T; 
    while (T--) {
        long long n, m;
        long long arr[100005];
        cin >> n >> m;
        for (int i = 0; i < n; i++) {
            cin >> arr[i];
        }
        int sign = 1;
        for (int i = 0; i < n; i++) {
            if(i == 0) {
                m += arr[i];
                arr[i] = 0;
                continue;
            }
            int temp = arr[i] - arr[i-1];
            if(temp > 1) {
                m += (temp - 1);
                arr[i] -= (temp - 1);
            } else if(temp < 1) {
                if(m >= -temp + 1) {
                    m -= (-temp + 1);
                    arr[i] += (-temp + 1);
                } else {
                    sign = 0;
                    break;
                }
            }
        }
        if(sign == 1) {
            cout << "YES" << endl;
        } else {
            cout << "NO" << endl;
        }
    }
    return 0;
}