Submission #1210354

#TimeUsernameProblemLanguageResultExecution timeMemory
1210354CodeLakVNCigle (COI21_cigle)C++20
48 / 100
47 ms2628 KiB
#include <bits/stdc++.h> using namespace std; #define task "main" #define no "NO" #define yes "YES" #define F first #define S second #define vec vector #define _mp make_pair #define ii pair<int, int> #define sz(x) (int)x.size() #define all(x) x.begin(), x.end() #define evoid(val) return void(std::cout << val) #define FOR(i, a, b) for(int i = (a); i <= (b); ++i) #define FOD(i, b, a) for(int i = (b); i >= (a); --i) template<class X, class Y> bool maximize(X &x, Y y) { if (x < y) { x = y; return true; } return false; } const int MAX_N = (int)5e3 + 5; int n; int a[MAX_N]; namespace sub4 { const int MAX_N = 505; int dp[MAX_N][MAX_N]; int sum[MAX_N]; bool mark[MAX_N * 5000]; void solve() { sum[0] = 0; FOR(i, 1, n) sum[i] = sum[i - 1] + a[i]; memset(dp, 0, sizeof(dp)); FOR(l, 2, n) { int curLength = 0; FOR(r, l, n) { int preLength = 0, res = 0; FOD(i, l - 1, 1) { if (mark[preLength]) res++; maximize(dp[l][r], dp[i][l - 1] + res); preLength += a[i]; } curLength += a[r]; mark[curLength] = 1; } FOD(r, n, l) { mark[curLength] = 0; curLength -= a[r]; } } int ans = 0; FOR(l, 1, n) maximize(ans, dp[l][n]); cout << ans << "\n"; } } void solve() { cin >> n; FOR(i, 1, n) cin >> a[i]; if (n <= 500) sub4::solve(); } int32_t main() { if (fopen(task".inp", "r")) { freopen(task".inp", "r", stdin); freopen(task".out", "w", stdout); } ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); bool multitest = 0; int numTest = 1; if (multitest) cin >> numTest; while (numTest--) { solve(); } return 0; } /* Lak lu theo dieu nhac!!!! */

Compilation message (stderr)

cigle.cpp: In function 'int32_t main()':
cigle.cpp:76:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   76 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
cigle.cpp:77:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   77 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
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