Submission #1124247

#TimeUsernameProblemLanguageResultExecution timeMemory
1124247mychecksedadPortal (BOI24_portal)C++17
0 / 100
5 ms328 KiB
/* Author : Mychecksdead */ #include<bits/stdc++.h> using namespace std; #define ll long long int #define MOD (1000000000+7) #define MOD1 (998244353) #define pb push_back #define all(x) x.begin(), x.end() #define en cout << '\n' #define ff first #define ss second #define pii pair<int,int> #define vi vector<int> const int N = 1e6+100, M = 1e5+10, K = 52, MX = 30, S = 300; ll n; array<ll, 2> a[N]; void solve(){ cin >> n; ll gx = 0; for(int i = 1; i <= n; ++i){ cin >> a[i][0] >> a[i][1]; if(i>1) gx=gcd(gx,abs(a[i][0]-a[i-1][0])); } ll ans = gx; sort(a+1, a+1+n); for(ll h = 2; h <= 200; ++h){ bool ok = 0; int tot = 0; for(ll s = 0; s <= 200; ++s){ bool kk = 1; tot = 0; for(int i = 2; i <= n; ++i){ tot += a[i][0] - a[i - 1][0]; // if(h == 2 && s == 1){ // cout << a[i][0] << ' ' << a[i - 1][0] << ' '; // cout << tot << ' ' << tot/gx*s << '\n'; // } if((tot / gx * s + 200*h) % h != (a[i][1] - a[1][1] + h * 200) % h) kk = 0; } if(kk){ ok = 1; break; } } if(ok) ans = max(ans, h*gx); } cout << ans; // vector<pair<int, int>> p; // for(int i = 1; i <= n; ++i){ // for(int j = i + 1; j <= n; ++j){ // p.pb({a[i][0] - a[j][0], a[i][1] - a[j][1]}); // p.pb({a[j][0] - a[i][0], a[j][1] - a[i][1]}); // } // } // for(auto x: p) cout << x.ff << ' ' << x.ss << '\n'; // vector<vector<int>> col(100, vi(100, -1)); // int c = 0; // for(int i = 0; i < 100; ++i){ // for(int j = 0; j < 100; ++j){ // if(col[i][j] == -1){ // for(auto x: p){ // int nx = x.ff + i, ny = x.ss + j; // if(nx >= 0 && ny >= 0 && nx < 100 && ny < 100){ // if(col[nx][ny] != -1) col[i][j] = col[nx][ny]; // } // } // if(col[i][j] == -1) // col[i][j] = c++; // } // for(auto x: p){ // int nx = x.ff + i, ny = x.ss + j; // if(nx >= 0 && ny >= 0 && nx < 100 && ny < 100){ // col[nx][ny] = col[i][j]; // } // } // } // } // for(int i = 0; i < 15; ++i){ // for(int j = 0; j < 15; ++j) cout << col[i][j] << ' '; // en; // } } int main(){ cin.tie(0); ios::sync_with_stdio(0); int tt = 1, aa; // freopen("in.txt", "r", stdin); // freopen("out.txt", "w", stdout); while(tt--){ solve(); en; } cerr<<"time taken : "<<(float)clock()/CLOCKS_PER_SEC<<" seconds\n"; return 0; }
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