結果
問題 | No.84 悪の算盤 |
ユーザー |
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提出日時 | 2014-12-02 23:37:45 |
言語 | C++11(廃止可能性あり) (gcc 13.3.0) |
結果 |
AC
|
実行時間 | 2 ms / 5,000 ms |
コード長 | 2,716 bytes |
コンパイル時間 | 549 ms |
コンパイル使用メモリ | 80,032 KB |
実行使用メモリ | 5,248 KB |
最終ジャッジ日時 | 2024-10-13 08:41:52 |
合計ジャッジ時間 | 1,110 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 10 |
ソースコード
#define _CRT_SECURE_NO_WARNINGS#include <string>#include <vector>#include <algorithm>#include <numeric>#include <set>#include <map>#include <queue>#include <iostream>#include <sstream>#include <cstdio>#include <cmath>#include <ctime>#include <cstring>#include <cctype>#include <cassert>#include <limits>#include <functional>#define rep(i,n) for(int (i)=0;(i)<(int)(n);++(i))#define rer(i,l,u) for(int (i)=(int)(l);(i)<=(int)(u);++(i))#define reu(i,l,u) for(int (i)=(int)(l);(i)<(int)(u);++(i))#if defined(_MSC_VER) || __cplusplus > 199711L#define aut(r,v) auto r = (v)#else#define aut(r,v) typeof(v) r = (v)#endif#define each(it,o) for(aut(it, (o).begin()); it != (o).end(); ++ it)#define all(o) (o).begin(), (o).end()#define pb(x) push_back(x)#define mp(x,y) make_pair((x),(y))#define mset(m,v) memset(m,v,sizeof(m))#define INF 0x3f3f3f3f#define INFL 0x3f3f3f3f3f3f3f3fLLusing namespace std;typedef vector<int> vi; typedef pair<int,int> pii; typedef vector<pair<int,int> > vpii;typedef long long ll; typedef vector<long long> vl; typedef pair<long long,long long> pll; typedef vector<pair<long long,long long> > vpll;typedef vector<string> vs; typedef long double ld;template<typename T, typename U> inline void amin(T &x, U y) { if(y < x) x = y; }template<typename T, typename U> inline void amax(T &x, U y) { if(x < y) x = y; }template<typename T, size_t WW>void rotate_left_square(T a[][WW], int n) {int n1 = n / 2, n2 = n - n1;rep(j, n1) rep(i, n2) {//a[j][i], a[n-1-i][j], a[n-1-j][n-1-i], a[i][n-1-j]T t = a[i][n-1-j];a[i][n-1-j] = a[n-1-j][n-1-i];a[n-1-j][n-1-i] = a[n-1-i][j];a[n-1-i][j] = a[j][i];a[j][i] = t;}}template<typename T, size_t WW>void rotate_left(T a[][WW], int H, int W) {rotate_left_square(a, max(H, W));int pad = max(0, H - W);if(pad > 0) {for(int i = 0; i < W; i ++)memcpy(a[i], a[i+pad], H * sizeof(**a));}}int main() {/*{ const int X = 8;bool a[X][X];rer(R, 1, X) rer(C, 1, X) {set<unsigned long long> s;rep(ty, R) rep(tx, C) {rep(y, R) rep(x, C)a[y][x] = true;a[ty][tx] = false;unsigned long long u = ~0ULL;rep(k, 4) {unsigned long long t = 0;rep(y, R) rep(x, C)t |= (unsigned long long)a[y][x] << (y*max(R,C)+x);amin(u, t);rotate_left(a, R, C);swap(R,C);}s.insert(u);}cerr << R << ", " << C << ": " << s.size() << endl;}}*/ll R, C;cin >> R >> C;ll ans;if(R != C) {ans = (R * C + 1) / 2;}else {ans = (R * R + 3) / 4;}cout << ans - 1 << endl;//ans = total - 90'return 0;}