吸氧了吗（o2）
by AlexSong @ 2024-01-31 10:47:47
先吸一下
by AlexSong @ 2024-01-31 10:48:11
@[AlexSong](/user/1004299)
开了，还是re
by weizekai @ 2024-01-31 11:15:02
```cpp
#include<bits/stdc++.h>
long long n,m,i,j,k,a[10000][10000],t,x,y,xx,yy,b[10000][2],ans;
int main(){
std::cin>>n>>m;
for(i=1;i<=n;i++)
{
for(j=1;j<=m;j++)
{
std::cin>>a[i][j];
}
}
std::cin>>t;
for(i=1;i<=t;i++)
{
std::cin>>x>>y>>xx>>yy;
std::swap(a[x][y],a[xx][yy]);
}
for(i=1;i<=n;i++)
{
for(j=1;j<=m;j++)
{
if(a[i][j-1]<a[i][j]&&a[i][j]>a[i][j+1]&&a[i][j]>a[i-1][j]&&a[i][j]>a[i+1][j])
{
b[++ans][0]=i;
b[ans][1]=j;
}
}
}
std::cout<<ans<<std::endl;
for(i=1;i<=ans;i++)
{
std::cout<<b[i][0]<<" "<<b[i][1]<<std::endl;
}
return 0;
}
by AlexSong @ 2024-01-31 11:31:20
@[weizekai](/user/1016066)
或者用C++17来写
```cpp
#include<bits/stdc++.h>
using namespace std;
int n, m, T, x1, x2, y_1, y2, cnt, a[1005][1005];
vector <pair<int, int>> vec;
int main(){
ios::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
cin >> n >> m;
for(int i = 1; i <= n; i ++) for(int j = 1; j <= m; j ++)
cin >> a[i][j];
cin >> T;
while(T --){
cin >> x1 >> y_1 >> x2 >> y2;
swap(a[x1][y_1], a[x2][y2]);
}
for(int i = 1; i <= n; i ++) for(int j = 1; j <= m; j ++)
if(a[i][j] > a[i - 1][j] && a[i][j] > a[i + 1][j] && a[i][j] > a[i][j - 1] && a[i][j] > a[i][j + 1]) vec.emplace_back(i, j), cnt ++;
cout << cnt << '\n';
for(auto [u, v] : vec) cout << u << ' ' << v << '\n';
return 0;
}
```
by dzsf_lhz @ 2024-02-25 14:22:19
~~不用吸氧~~
by dzsf_lhz @ 2024-02-25 14:23:43