座位预定
https://ac.nowcoder.com/acm/contest/318/C
C++版本一
題解：
沒有什么算法，也不怎么需要動腦，完完全全只考察了你們的代碼編寫和實現能力。寫的時候盡量用幾個函數將不同的情況進行分類討論，混在一起寫容易出現bug。只需要按題面描述的所有情況模擬就可以了。
#include <bits/stdc++.h> using namespace std;int r, n, _; char mp[55][15]; int seat[55]; int sta[5][2] = {{5, 7}, {3, 9}, {1, 11}, {6, 6}, {2, 10}};int cal_left() {int num = 0;for (int j = 1; j <= 5; j++) {for (int k = 1; k <= r + 3; k++)num += (mp[k][j] != '-' && mp[k][j] != '.');}return num; } int cal_right() {int num = 0;for (int j = 7; j <= 11; j++) {for (int k = 1; k <= r + 3; k++)num += (mp[k][j] != '-' && mp[k][j] != '.');}return num; } int get_min() {int id = 0, mn = 1e9, mx = 0;for (int j = 2; j < r + 3; j++) {if (seat[j] > mx) {mx = seat[j];id = j;mn = min(abs(j - 1), abs(j - (r / 2 + 2)));mn = min(mn, abs(j - (r + 3)));} else if (seat[j] == mx) {int cnt = min(abs(j - 1), abs(j - (r / 2 + 2)));cnt = min(abs(j - (r + 3)), cnt);if (mn > cnt) {id = j;mn = cnt;}}}return id; }void update(int row, char s) {for (int i = 0; i < 5; i++) {int p = sta[i][0], q = sta[i][1];if (mp[row][p] == '-' || mp[row][q] == '-') {if (mp[row][p] == '-' && mp[row][q] != '-')mp[row][p] = s;else if (mp[row][p] != '-' && mp[row][q] == '-')mp[row][q] = s;else {int num1 = cal_left(), num2 = cal_right();if (num1 <= num2)mp[row][p] = s;elsemp[row][q] = s;}return;}} }int main() {int cas = 1;for (scanf("%d", &_); _; _--) {memset(seat, 0, sizeof(seat));memset(mp, 0, sizeof(mp));scanf("%d%d", &r, &n);int flag = 0;for (int i = 1; i <= r + 3; i ++) {scanf("%s", mp[i] + 1);for (int j = 1; j <= 11; j++) {if (mp[i][j] == '-')seat[i]++;}if (i == 2 && seat[i] > 0)flag = 1;if (i == r / 2 + 3 && seat[i] > 0)flag = 1;}for (int i = 0; i < n; i++) {if (flag) {if (seat[2] >= seat[r / 2 + 3]) {update(2, i + 'a');seat[2]--;} else {update(r / 2 + 3, i + 'a');seat[r / 2 + 3]--;}if (seat[2] == 0 && seat[r / 2 + 3] == 0)flag = 0;} else {int id = get_min();update(id, i + 'a');seat[id]--;}}printf("Case #%d:\n", cas++);for (int i = 1; i <= r + 3; i++)printf("%s\n", mp[i] + 1);}return 0; }C++版本二?
#include <algorithm> #include <iostream> #include <cstring> #include <cstdio> #include <cctype> #include <cmath>using namespace std;long long T, r, n, s[110][110], v[110][100], h[110], e[60], w[13], lef, rig; char c[110][101];inline void read(long long &x) {int k = 1; x = 0;char c = getchar();while (!isdigit(c))if (c == '-') c = getchar(), k = -1;else c = getchar();while (isdigit(c))x = (x << 1) + (x << 3) + (c ^ 48),c = getchar();x *= k; }inline void Get(char &c) {c = '\n';while (c == '\n') c = getchar(); }inline int choosel() {if (e[2] && e[(r >> 1) + 3]){if (e[2] == e[(r >> 1) + 3]){ --e[2]; return 2; }if (e[2] > e[(r >> 1) + 3]){ --e[2]; return 2; }--e[(r >> 1) + 3]; return (r >> 1) + 3;}if (e[2]) { --e[2]; return 2; }if (e[(r >> 1) + 3]){ --e[(r >> 1) + 3]; return (r >> 1) + 3; }int now = 0, id;for (int i = 1; i <= r + 3; ++i)h[i] += e[i] * 1000000;for (int i = 1; i <= r + 3; ++i)if (h[i] > now && e[i] > 0)now = h[i], id = i;for (int i = 1; i <= r + 3; ++i)h[i] -= e[i] * 1000000;--e[id];return id; }inline int chooseh(int x) {int now = 0, id = 0;if (lef <= rig)for (int j = 1; j <= 5; ++j)if (w[j]) w[j] += 1;if (lef > rig)for (int j = 7; j <= 11; ++j)if (w[j]) w[j] += 1;for (int i = 1; i <= 11; ++i)if (w[i] > now && v[x][i] == 0)now = w[i], id = i;if (lef <= rig)for (int j = 1; j <= 5; ++j)if (w[j]) w[j] -= 1;if (lef > rig)for (int j = 7; j <= 11; ++j)if (w[j]) w[j] -= 1;if (id <= 5) ++lef;if (id >= 7) ++rig;return id; }signed main() {read(T);for (int plk = 1; plk <= T; ++plk){memset(v, 0, sizeof(v));memset(h, 0, sizeof(h));fill(e + 1, e + 55, 11);lef = 0, rig = 0;int ex, ey;read(r), read(n);for (int i = 1; i <= r + 3; ++i)for (int j = 1; j <= 11; ++j){Get(c[i][j]);v[i][j] = (c[i][j] == '#');if (v[i][j]){--e[i];if (j <= 5) ++lef;if (j >= 7) ++rig;}if (c[i][j] == '.')v[i][j] = 1,--e[i];}h[1] = h[(r >> 1) + 2] = h[r + 3] = 600000;for (int l = 1; l <= r + 3; ++l)for (int i = 2; i <= r + 2; ++i)if (i != (r >> 1) + 2)h[i] = max(h[i - 1], h[i + 1]) - 10000;for (int i = 1; i <= r + 3; ++i)h[i] += (n - i + 1) * 100;w[5] = w[7] = 1000000, w[3] = w[9] = 990000, w[1] = w[11] = 980000, w[2] = w[10] = 960000, w[6] = 970000;for (int k = 0; k < n; ++k){ex = choosel();ey = chooseh(ex);c[ex][ey] = char(k + 'a');v[ex][ey] = 1; }printf("Case #%d:\n", plk);for (int i = 1; i <= r + 3; ++i){for (int j = 1; j <= 11; ++j)printf("%c", c[i][j]);puts("");}}return 0; }?
總結
