#include #include #ifdef LOCAL #include #define debug(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__) #else #define debug(...) (static_cast(0)) #endif using namespace atcoder; using mint=modint1000000007; using namespace std; using ll=long long; using ul=unsigned long long; int dx[9] = {-1, 1, 0, 0, -1, -1, 1, 1, 0}; int dy[9] = {0, 0, -1, 1, -1, 1, -1, 1, 0}; using Graph=vector>; ll op(ll a,ll b){return min(a,b);} ll e(){return 2e9;} int main(){ ll H,W,Q; cin>>H>>W>>Q; ll ans=H*W; mapmp; while(Q--){ int Y,X; cin>>Y>>X; Y=H-Y+1; if(mp[X]