이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
using namespace std;
#define endl "\n"
typedef long long ll;
typedef unsigned long long ull;
template<class T, class T2> bool chkmax(T &a, const T2 &b) {return (a < b) ? a = b, 1 : 0;}
const int MAX_N = 1e1 + 10;
int tab[MAX_N][MAX_N];
int get(int n, int m) {
int total = n * m;
int ret = 0, retmask;
for(int mask = 0; mask < (1 << total); mask ++) {
for(int j = 0; j < total; j ++) {
tab[j / m][j % m] = (bool)(mask & (1 << j));
}
int a = 0;
for(int i = 0; i < n; i ++) {
int curr = 0;
for(int j = 0; j < m; j ++) {
if(tab[i][j]) {
curr ++;
} else {
curr --;
}
}
if(curr > 0) {
a ++;
}
}
for(int j = 0; j < m; j ++) {
int curr = 0;
for(int i = 0; i < n; i ++) {
if(tab[i][j]) {
curr --;
} else {
curr ++;
}
}
if(curr > 0) {
a ++;
}
}
if(chkmax(ret, a)) {
retmask = mask;
}
}
for(int j = 0; j < total; j ++) {
tab[j / m][j % m] = (bool)(retmask & (1 << j));
}
cout << n << " " << m << " " << ret << endl;
for(int i = 0; i < n; i ++) {
for(int j = 0; j < m; j ++) {
cout << tab[i][j] << " ";
}
cout << endl;
}
cout << "!" << endl;
return ret;
}
int cnt[MAX_N];
char ans[MAX_N][MAX_N];
int getFast(int n, int m) {
for(int i = 0; i < m; i ++) {
cnt[i] = n;
}
bool rev = 0;
if(n > m) {
rev = true;
swap(n, m);
}
int ret = max(n, m);
int halfCnt = (m / 2) + 1;
int gotten = 0, opti = 0;
for(int i = 0; i < n; i ++) {
//sort(cnt, cnt + m);
//reverse(cnt, cnt + m);
for(int j = 0; j < halfCnt; j ++) {
cnt[j] --;
}
gotten ++;
int curr = gotten;
for(int j = 0; j < m; j ++) {
if(cnt[j] * 2 > n) {
curr ++;
}
}
if(chkmax(ret, curr)) {
opti = i + 1;
}
}
for(int i = 0; i < n; i ++) {
for(int j = 0; j < m; j ++) {
ans[i][j] = '-';
}
}
for(int i = 0; i < opti; i ++) {
for(int j = 0; j < halfCnt; j ++) {
ans[i][j] = '+';
}
}
if(rev) {
for(int i = 0; i < n; i ++) {
for(int j = 0; j < m; j ++) {
if(ans[i][j] == '-') {
ans[i][j] = '+';
} else {
ans[i][j] = '-';
}
}
}
}
if(rev) {
for(int i = 0; i < n; i ++) {
for(int j = 0; j < m; j ++) {
if(i < j) {
swap(ans[i][j], ans[j][i]);
}
}
}
swap(n, m);
}
int a = 0;
for(int i = 0; i < n; i ++) {
int curr = 0;
for(int j = 0; j < m; j ++) {
if(ans[i][j] == '+') {
curr ++;
} else {
curr --;
}
}
if(curr > 0) {
a ++;
}
}
for(int j = 0; j < m; j ++) {
int curr = 0;
for(int i = 0; i < n; i ++) {
if(ans[i][j] == '+') {
curr --;
} else {
curr ++;
}
}
if(curr > 0) {
a ++;
}
}
//cout << a << " " << ret << endl;
cout << n << endl;
for(int i = 0; i < n; i ++) {
for(int j = 0; j < m; j ++) {
cout << ans[i][j];
}
cout << endl;
}
//assert(a == ret);
return ret;
}
int main() {
ios_base::sync_with_stdio(false); cin.tie(NULL);
int t;
cin >> t;
while(t --) {
int n, m;
cin >> n >> m;
getFast(n, m);
}
}
컴파일 시 표준 에러 (stderr) 메시지
stones.cpp: In function 'int get(int, int)':
stones.cpp:49:23: warning: 'retmask' may be used uninitialized in this function [-Wmaybe-uninitialized]
49 | tab[j / m][j % m] = (bool)(retmask & (1 << j));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
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