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>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define fr(x, l, r) for(int x = l; x <= r; x++)
#define rf(x, l, r) for(int x = l; x >= r; x--)
#define fe(x, y) for(auto& x : y)
#define fi first
#define se second
#define m_p make_pair
#define pb push_back
#define pw(x) (ull(1) << ull(x))
#define all(x) (x).begin(),x.end()
#define sz(x) (int)x.size()
#define mt make_tuple
#define ve vector
using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
typedef pair <ll,ll> pll;
typedef pair <int,int> pii;
typedef pair <ld,ld> pld;
template<typename T>
using oset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#define fbo find_by_order
#define ook order_of_key
template<typename T>
bool umn(T& a, T b) { return a > b ? a = b, 1 : 0; }
template<typename T>
bool umx(T& a, T b) { return a < b ? a = b, 1 : 0; }
const ll inf = 1e18;
const int intf = 1e9;
const ll mod = 1e9 + 7;
const ld eps = 0.00000001;
const ll N = 30;
ll let[N][N][N][N], n, m, cnt[N][N];
//void rec(int x, int y, int mv){
// fr(i, x, n){
// fr(j, y, m){
// if(let[i][j][i][j + 1]){
// cnt[i][j]--;
// cnt[i][j + 1]--;
// let[i][j]
//
// }
// }
// }
//
//}
int main(){
#ifdef LOCAL
freopen("input.txt", "r", stdin);
freopen("output.txt","w", stdout);
ios_base::sync_with_stdio(0);
cin.tie(0);
#else
// freopen("mountains.in", "r", stdin);
// freopen("mountains.out","w", stdout);
ios_base::sync_with_stdio(0);
cin.tie(0);
#endif
cin >> n >> m;
//
// fr(i, 0, n){
// string s;
// cin >> s;
// fr(j, 0, sz(s) - 1){
// int c;
// c = s[j] - '0';
// if(c){
// cnt[j + 1][i]++;
// cnt[j + 1][i + 1]++;
// let[j + 1][i + 1][j + 1][i] = 1;
// let[j + 1][i][j + 1][i + 1] = 1;
// }
// }
// }
//
//
//
// fr(i, 0, m - 1){
// string s;
// cin >> s;
// fr(j, 0, sz(s) - 1){
// int c;
// c = s[j] - '0';
// if(c){
// cnt[j][i + 1]++;
// cnt[j + 1][i + 1]++;
// let[j + 1][i + 1][j][i + 1] = 1;
// let[j][i + 1][j + 1][i + 1] = 1;
// }
// }
// }
cout << n*m << endl;
return 0;
}
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