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23题阅读程序:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 |
#include <iostream> using namespace std; int g(int m, int n, int x) { int ans = 0; int i; if (n == 1) return 1; for (i = x; i <= m / n; i++) ans += g(m - i, n - 1, i); return ans; } int main() { int t, m, n; cin >> m >> n; cout << g(m, n, 0) << endl; return 0; } |
输入:8 4
输出为
24题:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 |
#include <iostream> using namespace std; int main() { int n, i, j, x, y, nx, ny; int a[40][40]; for (i = 0; i < 40; i++) for (j = 0; j < 40; j++) a[i][j] = 0; cin >> n; y = 0; x = n - 1; n = 2 * n - 1; for (i = 1; i <= n * n; i++) { a[y][x] = i; ny = (y - 1 + n) % n; nx = (x + 1) % n; if ((y == 0 && x == n - 1) || a[ny][nx] != 0) y = y + 1; else { y = ny; x = nx; } } for (j = 0; j < n; j++) cout << a[0][j] << " "; cout << endl; return 0; } |
输入:3 输出:
25题:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 |
#include <iostream> using namespace std; int n, s, a[100005], t[100005], i; void mergesort(int l, int r) { if (l == r) return; int mid = (l + r) / 2; int p = l; int i = l; int j = mid + 1; mergesort(l, mid); mergesort(mid + 1, r); while (i <= mid && j <= r) { if (a[j] < a[i]) { s += mid - i + 1; t[p] = a[j]; p++; j++; } else { t[p] = a[i]; p++; i++; } } while (i <= mid) { t[p] = a[i]; p++; i++; } while (j <= r) { t[p] = a[j]; p++; j++; } for (i = l; i <= r; i++) a[i] = t[i]; } int main() { cin >> n; for (i = 1; i <= n; i++) cin >> a[i]; mergesort(1, n); cout << s << endl; return 0; } |
输入:6
2 6 3 4 5 1
输出:
26题:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 |
#include <iostream> using namespace std; int main() { int n, m; cin >> n >> m; int x = 1; int y = 1; int dx = 1; int dy = 1; int cnt = 0; while (cnt != 2) { cnt = 0; x = x + dx; y = y + dy; if (x == 1 || x == n) { ++cnt; dx = -dx; } if (y == 1 || y == m) { ++cnt; dy = -dy; } } cout << x << " " << y << endl; return 0; } |
输入 1:4 3 输出 1:
输入 2:2017 1014 输出 2:
输入 3:987 321 输出 3: