Submission #37710

#TimeUsernameProblemLanguageResultExecution timeMemory
37710grumpy_gordonK blocks (IZhO14_blocks)C++14
0 / 100
16 ms10392 KiB
/* .:*+=%@@@@@@=-. .:=@#@@@#@@#######%==*. .-=####@######%*-.....:%##%. .*@###########%+:--........-%@- .*@##############@+--.........-:%- .+##################@==%%%%=+*:----+. .-@####################%++%@@@@@=+**%@@* .%###################@%%@@@###@%+:--%@@%. -@###################@%%%%*::*%++:-----=@+. -#####################@%=++++++*:-------.-=: .+####################@%++*::-:::--::*:::***=: .@#####################%=++*::::-:::++*=##@@#@- ..#####################@%%=++**:::::**+%@#@%%##-.. .%####################@@%=+++*+****::*=@######@. .=######################@%%==+==++**+=@%@##@###+:... -#######################@@@%%%===++=@@@%=++===*::--... -########################@@@@@@@%==%%=++==@@:::::*:--. ..:#########################@@@@@@%%======++++::-..:-.--... %#############################@###@%%@@%==%=%*----.--.::---. #############################################*-:*:-:---*---- . #############################################*--*--:---*---:-. #############################################+--::--::-*::-::. ###########################################+:*-.---.---.:---*-.. ###########################################**:-----------------. ##########################################@::**:--::::::--:::::- ###########################################:--:*:::::::::**::*+* ###########################################=:::***::::::**:::*+* ############################@@@@@@#########@+****::::********+++ ############################@%%%%%@@@@@@@###%+***::::::::***+==+ ############################@%%%%%%%%%%%@####=+:::-::::-::*+=%%+ #############################@%%%%%%%%%%@#####=::--------:*=%@%+ %###########################@%%%%==%%%%%%@##@#=:------..-:+%@@%= ---------------------------------------------- -------------------------------------------- ---------------------------------------------- -------------------------------------------- ---------------------------------------------- o###########oo o##" ""##o o#" "## o#" "#o #" ## ## "## #" ## # ################### # # # # # # # # # # # # # #o # "#o ## "#o ## "#o o#" "#o ## "#o o#" "#ooo ooo#######oo ############### "######o o###"" "###o # ### o###o oooo ### oo####" o###**# #**# ############" ""##""""""""""########### # # oooooooo#"#** ## # # # # # ** ## # #o# #o# *****###ooo# ## ## o###o ## o##***## o########## #***#**##o o##" ""### #***##***# o#######o ### oo#### ##**####*# o##" ""#############"" ##****### ##" ## ##*##*### ## ### ##### ## ## ### # ## # ## ## # ## ## ## ### ## ###oo ### ""### ### ### */ #include <bits/stdc++.h> //#pragma GCC optimize("O3") //#pragma GCC optimize("Ofast,no-stack-protector") //#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx") //#pragma GCC target("avx,tune=native") using namespace std; typedef long long ll; typedef long double ld; int mysqrt(ll x){ int l = 0, r = 1e9 + 1; while (r - l > 1){ int m = (l + r) / 2; if (m * (ll)m <= x) l = m; else r = m; } return l; } mt19937 rnd(1337); ll AR = 19, BR = 13, CR = 23, XR = 228, YR = 322, MODR = 1e9 + 993; ll myrand(){ ll ZR = (XR * AR + YR * BR + CR) % MODR; XR = YR; YR = ZR; return ZR; } const int Mod = 1e9 + 7; int bpow(int x, int y){ if (y == 0) return 1; if (y == 1) return x; int ret = bpow(x, y >> 1); ret = (ret * (ll)ret) % Mod; if (y & 1) ret = (ret * (ll)x) % Mod; return ret; } int bdiv(int x, int y){ return (x * (ll)bpow(y, Mod - 2)) % Mod; } void setmin(int &x, int y){ x = min(x, y); } void setmax(int &x, int y){ x = max(x, y); } const ll llinf = 1e18 + 100; const int maxn = 1e5 + 100, inf = 2e9 + 100, sq = 300, mod = 1e9 + 7, LG = 17; int n, k; int a[maxn]; int sp[LG][maxn]; int splast[maxn]; int getmin(int l, int r){ int lg = splast[r - l + 1]; return max(sp[lg][l], sp[lg][r - (1 << lg) + 1]); } int dp[2][maxn]; void go(int l, int r, int opl, int opr){ if (l > r) return; int m = (l + r) / 2; int opm; int val = inf; for (int i = opl; i <= min(opr, m - 1); i++) if (dp[0][i] + getmin(i + 1, m) <= val) val = dp[0][i] + getmin(i + 1, m), opm = i; dp[1][m] = val; go(l, m - 1, opl, opm); go(m + 1, r, opm, opr); } int main() { #ifdef ONPC //ifstream cin("a.in"); //ofstream cout("a.out"); freopen("a.in", "r", stdin); freopen("a.out", "w", stdout); #else //ifstream cin("a.in"); //ofstream cout("a.out"); //freopen("trap.in", "r", stdin); //freopen("trap.out", "w", stdout); #endif // ONPC ios::sync_with_stdio(0); cin.tie(0); cout.tie(0); cin >> n >> k; splast[1] = 0; for (int i = 2; i <= n; i++){ splast[i] = splast[i - 1]; if ((1 << (splast[i] + 1)) == i) splast[i]++; } for (int i = 0; i < n; i++) cin >> a[i], sp[0][i] = a[i]; for (int j = 1; j < LG; j++) for (int i = 0; i + (1 << j) <= n; i++) sp[j][i] = max(sp[j - 1][i], sp[j - 1][i + (1 << (j - 1))]); dp[1][0] = a[0]; for (int i = 1; i < n; i++) dp[1][i] = max(dp[1][i - 1], a[i]); while (--k){ for (int i = 0; i < n; i++) dp[0][i] = dp[1][i]; go(0, n - 1, 0, n - 1); } cout << dp[1][n - 1]; }

Compilation message (stderr)

blocks.cpp: In function 'void go(int, int, int, int)':
blocks.cpp:177:27: warning: 'opm' may be used uninitialized in this function [-Wmaybe-uninitialized]
     go(l, m - 1, opl, opm);
                           ^
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