| # |
제출 시각 |
아이디 |
문제 |
언어 |
결과 |
실행 시간 |
메모리 |
| 887931 |
2023-12-15T14:00:42 Z |
nnhzzz |
Po (COCI21_po) |
C++14 |
|
74 ms |
13480 KB |
// cre: Nguyen Ngoc Hung - Train VOI 2024 :>
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <unordered_set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>
#include <cstring>
#include <unordered_map>
#include <cmath>
#include <array>
#include <cassert>
#include <random>
using namespace std;
#define SORT_UNIQUE(v) sort(ALL(v)),(v).resize(unique(ALL(v))-(v).begin())
#define __nnhzzz__ signed main()
#define BIT(i,j) ((i>>j)&1LL)
#define MASK(i) (1LL<<i)
#define RALL(x) (x).rbegin(),(x).rend()
#define ALL(x) (x).begin(),(x).end()
#define SZ(x) (int)(x).size()
#define fi first
#define se second
#define INF 0x3f3f3f3f
#define ll long long
#define ull unsigned long long
#define ld long double
#define vi vector<int>
#define vvi vector<vi>
#define vvvi vector<vvi>
#define vvvvi vector<vvvi>
#define pii pair<int,int>
#define vpii vector<pii>
#define RESET(x,val) memset((x),(val),sizeof(x))
#define REPDIS(i,be,en,j) for(int i = (be); i<=(en); i+=j)
#define REPD(i,be,en) for(int i = (be); i>=(en); i--)
#define REP(i,be,en) for(int i = (be); i<=(en); i++)
//-------------------------------------------------------------//
const int oo = 1e9,LOG = 20,MAXN = 1e5+7,N = 1e2+3;
const int MOD = 1e9+7,MOD1 = 1e9+207,MOD2 = 1e9+407,MOD3 = 998244353;
//-------------------------------------------------------------//
template<typename T1, typename T2> bool mini(T1 &a, T2 b){if(a>b){a=b;return true;}return false;}
template<typename T1, typename T2> bool maxi(T1 &a, T2 b){if(a<b){a=b;return true;}return false;}
template<typename T> T gcd(T a, T b) { while(b) { a %= b; swap(a,b); } return a; }
template<typename T> T lcm(T a, T b) { return a/gcd(a,b)*b; }
/*
----------------------------------------------------------------
END OF TEMPLATE
----------------------------------------------------------------
Nguyen Ngoc Hung - nnhzzz
Training for VOI24 gold medal
----------------------------------------------------------------
*/
int a[MAXN];
struct SEGMENT_TREE{
vpii st;
vi lazy;
int n;
void pushdown(int id, int l, int r){
if(l==r || lazy[id]==0){
return ;
}
st[id<<1].fi -= lazy[id];
st[id<<1|1].fi -= lazy[id];
lazy[id<<1] += lazy[id];
lazy[id<<1|1] += lazy[id];
lazy[id] = 0;
}
void build(int id, int l, int r){
if(l==r){
st[id] = {a[l],l};
return ;
}
int mid = (l+r)>>1;
build(id<<1,l,mid);
build(id<<1|1,mid+1,r);
if(st[id<<1].fi<=st[id<<1|1].fi) st[id] = st[id<<1];
else st[id] = st[id<<1|1];
}
void update(int id, int l, int r, int lo, int hi, int val){
if(l>hi || r<lo){
return ;
}
if(l>=lo && r<=hi){
st[id].fi -= val;
lazy[id] += val;
return ;
}
pushdown(id,l,r);
int mid = (l+r)>>1;
update(id<<1,l,mid,lo,hi,val);
update(id<<1|1,mid+1,r,lo,hi,val);
if(st[id<<1].fi<=st[id<<1|1].fi) st[id] = st[id<<1];
else st[id] = st[id<<1|1];
}
pii get(int id, int l, int r, int lo, int hi){
if(l>hi || r<lo){
return {oo,n+1};
}
if(l>=lo && r<=hi){
return st[id];
}
pushdown(id,l,r);
int mid = (l+r)>>1;
pii res = get(id<<1,l,mid,lo,hi);
pii tmp = get(id<<1|1,mid+1,r,lo,hi);
if(res.fi<=tmp.fi){
return res;
}else{
return tmp;
}
}
pii get(int l, int r){
return get(1,1,n,l,r);
}
void update(int l, int r, int val){
update(1,1,n,l,r,val);
}
SEGMENT_TREE(int _ = 0):n(_){
st.assign(n<<2|1,{0,0});
lazy.assign(n<<2|1,0);
}
};
int res = 0,n;
SEGMENT_TREE seg;
void dnc(int l, int r, int x){
if(l>r) return ;
seg.update(l,r,x);
auto [mi,pos] = seg.get(l,r);
res += (mi>0);
dnc(l,pos-1,mi);
dnc(pos+1,r,mi);
}
void solve(){
int mi = oo; cin >> n;
REP(i,1,n){
cin >> a[i];
mini(mi,a[i]);
}
seg = SEGMENT_TREE(n);
seg.build(1,1,n);
dnc(1,n,mi);
cout << res+(mi>0);
}
__nnhzzz__{
ios::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
#define name "test"
if(fopen(name".inp","r")){
freopen(name".inp","r",stdin);
freopen(name".out","w",stdout);
}
#define name1 "nnhzzz"
if(fopen(name1".inp","r")){
freopen(name1".inp","r",stdin);
freopen(name1".out","w",stdout);
}
int test = 1;
while(test--){
solve();
}
cerr << "\nTime elapsed: " << 1000*clock()/CLOCKS_PER_SEC << "ms\n";
return 0;
}
Compilation message
Main.cpp: In function 'void dnc(int, int, int)':
Main.cpp:171:10: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
171 | auto [mi,pos] = seg.get(l,r);
| ^
Main.cpp: In function 'int main()':
Main.cpp:194:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
194 | freopen(name".inp","r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Main.cpp:195:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
195 | freopen(name".out","w",stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:199:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
199 | freopen(name1".inp","r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:200:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
200 | freopen(name1".out","w",stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
1 ms |
348 KB |
Output is correct |
| 4 |
Correct |
20 ms |
3144 KB |
Output is correct |
| 5 |
Correct |
29 ms |
4444 KB |
Output is correct |
| 6 |
Correct |
66 ms |
11040 KB |
Output is correct |
| 7 |
Correct |
74 ms |
13480 KB |
Output is correct |
