Submission #362233

#TimeUsernameProblemLanguageResultExecution timeMemory
362233knightron0Rectangles (IOI19_rect)C++14
0 / 100
2 ms620 KiB
#include <bits/stdc++.h> using namespace std; #define pb push_back #define fr first #define sc second #define clr(a, x) memset(a, x, sizeof(a)) #define dbg(x) cout<<"("<<#x<<"): "<<x<<endl; #define printvector(arr) for (auto it = arr.begin(); it != arr.end(); ++it) cout<<*it<<" "; cout<<endl; #define all(v) v.begin(), v.end() #define lcm(a, b) (a * b)/__gcd(a, b) #define printvecpairs(vec) for(auto it: vec) cout<<it.fr<<' '<<it.sc<<endl; #define endl '\n' #define lli long long int #define float long double const int MOD = 1e9 + 7; const int MAXN = 2506; int pref[MAXN][MAXN]; lli sum(vector<vector<int>> ahnice){ return 0LL; } lli count_rectangles(vector<vector<int>> a) { int n = a.size(); int m = a[0].size(); lli ans =0; pref[0][0] = a[0][0]; for(int i=1;i<n;i++) pref[0][i] = pref[0][i-1] + a[0][i]; for(int i=1;i<m;i++) pref[i][0] = pref[i-1][0] + a[i][0]; for(int i= 1;i<n;i++){ for(int j= 1;j<m;j++){ pref[i][j] = pref[i-1][j] + pref[i][j-1] - pref[i-1][j-1] + a[i][j]; } } // sum(pref); // for(int r1= 0;r1<n;r1++){ // for(int c1= 0;c1<m;c1++){ // for(int r2= r1+2;r2<n;r2++){ // for(int c2= c1+2;c2<m;c2++){ // // sum // } // } // } // } return ans; } // signed main() { // ios_base::sync_with_stdio(false); // cin.tie(NULL); // #ifdef LOCAL // freopen("input.txt", "r", stdin); // #endif // int n, m; // cin>>n>>m; // vector<vector<int>> vec; // for(int i= 0;i<n;i++){ // vector<int> tmp; // for(int j= 0;j<m;j++){ // int x; // cin>>x; // tmp.pb(x); // } // vec.pb(tmp); // } // cout<<count_rectangles(vec)<<endl; // return 0; // }
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