This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
#define x first
#define y second
#define pb push_back
#define all(a) a.begin(),a.end()
#define int long long
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
typedef pair<int,int>pi;
typedef pair<ll,ll>pll;
typedef vector<ll>vll;
typedef vector<int>vi;
typedef vector<bool>vb;
typedef vector<vi>vvi;
typedef vector<vll>vvll;
typedef vector<pi>vpi;
typedef vector<pll>vpll;
const int N=1e3+99;
char a[N][N];
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int tt;
cin>>tt;
while(tt--){
int n,m;
cin>>n>>m;
// cout<<max(n,m)+(min(n,m)-1)/2*max(n,m)/((max(n,m)+2)/2)<<"\n";
for(int i=1;i<=n;++i){
for(int j=1;j<=m;++j){
a[i][j]='$';
}
}
multiset<pi>st;
if(n<=m){
for(int i=1;i<=m;++i){
st.insert({0,i});
}
int cnt=0;
for(int i=1;i<=n;++i){
int cur=0;
bool ok=1;
while(cur<(m+2)/2){
auto [c,j]=*st.begin();
if(c>=(n-1)/2){
ok=false;
break;
}
else{
st.erase(st.begin());
st.insert({++c,j});
a[i][j]='+';
cur++;
}
}
if(ok){
cnt++;
}
}
cout<<m+cnt<<"\n";
for(int i=1;i<=n;++i){
for(int j=1;j<=m;++j){
if(a[i][j]=='+'){
cout<<'+';
}
else{
cout<<'-';
}
}
cout<<"\n";
}
}
// else{
// for(int i=1;i<=n;++i){
// st.insert({0,i});
// }
// int cnt=0;
// for(int i=1;i<=m;++i){
// int cur=0;
// bool ok=1;
// while(cur<(n+2)/2){
// auto [c,j]=*st.begin();
// if(c>=(m-1)/2){
// ok=false;
// break;
// }
// else{
// st.erase(st.begin());
// st.insert({++c,j});
// a[i][j]='-';
// cur++;
// }
// }
// if(ok){
// cnt++;
// }
// }
// cout<<n+cnt<<"\n";
// for(int i=1;i<=n;++i){
// for(int j=1;j<=m;++j){
// if(a[i][j]=='-'){
// cout<<'-';
// }
// else{
// cout<<'+';
// }
// }
// cout<<"\n";
// }
// }
}
}
Compilation message (stderr)
stones.cpp: In function 'int main()':
stones.cpp:53:26: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
53 | auto [c,j]=*st.begin();
| ^
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