Submission #390414

#TimeUsernameProblemLanguageResultExecution timeMemory
390414acmSimple game (IZhO17_game)C++14
100 / 100
74 ms6928 KiB
#include <bits/stdc++.h> #define speed \ ios_base::sync_with_stdio(0); \ cin.tie(0); \ cout.tie(0); #define precision \ cout.precision(30); \ cerr.precision(10); #define ll long long #define ld long double #define pll pair<ll, ll> #define pii pair<int, int> #define forn(n) for (int i = 1; i <= n; i++) #define forlr(l, r) for (int i = l; i != r; (l > r ? i-- : i++)) #define pb(x) push_back(x) #define sz(x) (int)x.size() #define mp(x, y) make_pair(x, y) #define all(x) x.begin(), x.end() #define pc(x) __builtin_popcount(x) #define pcll(x) __builtin_popcountll(x) #define F first #define S second using namespace std; mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count()); void ioi(string name) { freopen((name + ".in").c_str(), "r", stdin); freopen((name + ".out").c_str(), "w", stdout); } int n, q, a[1000005], b[1000005]; void upd(int x, int y) { for (; x <= 1000000; x += (x & -x)) b[x] += y; } int get(int x) { int y = 0; for (; x > 0; x -= (x & -x)) y += b[x]; return y; } int main() { speed; precision; // code cin >> n >> q; for (int i = 1; i <= n; i++) { cin >> a[i]; if (i > 1) { upd(min(a[i - 1], a[i]), 1); upd(max(a[i - 1], a[i]) + 1, -1); } } while (q--) { int type, x, y; cin >> type; if (type == 1) { cin >> x >> y; if (x > 1) { upd(min(a[x - 1], a[x]), -1); upd(max(a[x - 1], a[x]) + 1, 1); } if (x < n) { upd(min(a[x], a[x + 1]), -1); upd(max(a[x], a[x + 1]) + 1, 1); } a[x] = y; if (x > 1) { upd(min(a[x - 1], a[x]), 1); upd(max(a[x - 1], a[x]) + 1, -1); } if (x < n) { upd(min(a[x], a[x + 1]), 1); upd(max(a[x], a[x + 1]) + 1, -1); } } if (type == 2) { cin >> x; cout << get(x) << " "; } } // endl #ifndef ONLINE_JUDGE cerr << "\nTime elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n"; #endif return 0; }

Compilation message (stderr)

game.cpp: In function 'void ioi(std::string)':
game.cpp:26:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   26 |   freopen((name + ".in").c_str(), "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
game.cpp:27:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   27 |   freopen((name + ".out").c_str(), "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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