Submission #529454

#TimeUsernameProblemLanguageResultExecution timeMemory
529454jiahngCigle (COI21_cigle)C++14
Compilation error
0 ms0 KiB
#include <bits/stdc++.h> using namespace std; typedef long long ll; #define int ll typedef pair<int,int> pi; typedef vector <ll> vi; typedef vector <pi> vpi; typedef pair<pi, ll> pii; typedef set <ll> si; typedef long double ld; #define f first #define s second #define mp make_pair #define FOR(i,s,e) for(int i=s;i<=int(e);++i) #define DEC(i,s,e) for(int i=s;i>=int(e);--i) #define pb push_back #define all(x) (x).begin(), (x).end() #define lbd(x, y) lower_bound(all(x), y) #define ubd(x, y) upper_bound(all(x), y) #define aFOR(i,x) for (auto i: x) #define mem(x,i) memset(x,i,sizeof x) #define fast ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0) #define MOD 1000000007 #define maxn 5001 #define getchar_unlocked _getchar_nolock int N,D[maxn],ss[maxn]; inline int readInt() { int x = 0; char ch = getchar_unlocked(); while (ch < '0' || ch > '9') ch = getchar_unlocked(); while (ch >= '0' && ch <= '9'){ x = (x << 3) + (x << 1) + ch - '0'; ch = getchar_unlocked(); } return x; } struct custom_hash { static uint64_t splitmix64(uint64_t x) { x += 0x9e3779b97f4a7c15; x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; x = (x ^ (x >> 27)) * 0x94d049bb133111eb; return x ^ (x >> 31); } size_t operator()(uint64_t x) const { static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); return splitmix64(x + FIXED_RANDOM); } }; vi A[maxn]; int dp[maxn],R[maxn][maxn]; int32_t main() { fast; N = readInt(); FOR(i,1,N){ D[i] = readInt(); ss[i] = ss[i-1] + D[i]; } mem(R, -1); FOR(l,1,N) FOR(r,l+1,N) if ((ss[l-1] + ss[r]) % 2 == 0){ int ssb = (ss[l-1] + ss[r]) / 2; int b = lower_bound(ss+l,ss+r,ssb) - ss; if (ss[b] == ssb){ //~ cout << l << ' ' << b << ' ' << r << '\n'; A[b].pb(l); assert(R[l][b] == -1); R[l][b] = r+1; } } DEC(i,N,1){ dp[i] = dp[i+1]; FOR(b, i, N) if (R[i][b] != -1) { //~ if (i == 3) cout << b << ' ' << R[i][b] << ' ' << (A[b].end() - lbd(A[b], i)) << '\n'; dp[i] = max(dp[i], dp[R[i][b] + 1] + (A[b].end() - lbd(A[b], i))); } //~ cout << dp[i] << ' '; } cout << dp[1]; }

Compilation message (stderr)

cigle.cpp: In function 'll readInt()':
cigle.cpp:26:26: error: '_getchar_nolock' was not declared in this scope; did you mean 'getchar_unlocked'?
   26 | #define getchar_unlocked _getchar_nolock
      |                          ^~~~~~~~~~~~~~~
cigle.cpp:32:15: note: in expansion of macro 'getchar_unlocked'
   32 |     char ch = getchar_unlocked();
      |               ^~~~~~~~~~~~~~~~