oj.uz

Submission #737040

# Submission time Handle Problem Language Result Execution time Memory
737040 2023-05-06T13:46:12 Z josanneo22 Election (BOI18_election) C++17
100 / 100
 506 ms 44488 KB 
#include<bits/stdc++.h>
using namespace std;

#define pb push_back
#define pii pair<int,int>
#define fi first
#define se second 


void __print(int x) { cerr << x; }
void __print(long x) { cerr << x; }
void __print(long long x) { cerr << x; }
void __print(unsigned x) { cerr << x; }
void __print(unsigned long x) { cerr << x; }
void __print(unsigned long long x) { cerr << x; }
void __print(float x) { cerr << x; }
void __print(double x) { cerr << x; }
void __print(long double x) { cerr << x; }
void __print(char x) { cerr << '\'' << x << '\''; }
void __print(const char *x) { cerr << '\"' << x << '\"'; }
void __print(const string &x) { cerr << '\"' << x << '\"'; }
void __print(bool x) { cerr << (x ? "true" : "false"); }
template <typename A>
void __print(const A &x);
template <typename A, typename B>
void __print(const pair<A, B> &p);
template <typename... A>
void __print(const tuple<A...> &t);
template <typename T>
void __print(stack<T> s);
template <typename T>
void __print(queue<T> q);
template <typename T, typename... U>
void __print(priority_queue<T, U...> q);
template <typename A>
void __print(const A &x) {
    bool first = true;
    cerr << '{';
    for (const auto &i : x) {
        cerr << (first ? "" : ","), __print(i);
        first = false;
    }
    cerr << '}';
}
template <typename A, typename B>
void __print(const pair<A, B> &p) {
    cerr << '(';
    __print(p.first);
    cerr << ',';
    __print(p.second);
    cerr << ')';
}
template <typename... A>
void __print(const tuple<A...> &t) {
    bool first = true;
    cerr << '(';
    apply([&first](const auto &...args) { ((cerr << (first ? "" : ","), __print(args), first = false), ...); }, t);
    cerr << ')';
}
template <typename T>
void __print(stack<T> s) {
    vector<T> debugVector;
    while (!s.empty()) {
        T t = s.top();
        debugVector.push_back(t);
        s.pop();
    }
    reverse(debugVector.begin(), debugVector.end());
    __print(debugVector);
}
template <typename T>
void __print(queue<T> q) {
    vector<T> debugVector;
    while (!q.empty()) {
        T t = q.front();
        debugVector.push_back(t);
        q.pop();
    }
    __print(debugVector);
}
template <typename T, typename... U>
void __print(priority_queue<T, U...> q) {
    vector<T> debugVector;
    while (!q.empty()) {
        T t = q.top();
        debugVector.push_back(t);
        q.pop();
    }
    __print(debugVector);
}
void _print() { cerr << "]\n"; }
template <typename Head, typename... Tail>
void _print(const Head &H, const Tail &...T) {
    __print(H);
    if (sizeof...(T))
        cerr << ", ";
    _print(T...);
}
#ifndef ONLINE_JUDGE
#define debug(...) cerr << "Line:" << __LINE__ << " [" << #__VA_ARGS__ << "] = ["; _print(__VA_ARGS__)
#else
#define debug(...)
#endif


#define int long long
char buf[1<<23],*p1=buf,*p2=buf;
#define getchar() (p1==p2&&(p2=(p1=buf)+fread(buf,1,1<<21,stdin),p1==p2)?EOF:*p1++)
inline int rd()
{
	int s=0;
	char ch=getchar(),last;
	while(ch<'0'||ch>'9') last=ch,ch=getchar();
	while(ch>='0'&&ch<='9') s=(s<<1)+(s<<3)+(ch^48),ch=getchar();
	return last=='-'?-s:s;
}
int num[100];
inline void rt(int x)
{
	if(x<0) putchar('-'),x=-x;;
	int len=0;
	do num[len++]=x%10;while(x/=10);
	while(len--) putchar(num[len]+'0');
}

int n, q;
string s;
 
struct node {
    int L, R;
    int sum;
    int best;
    node operator + (const node& other) const {
        node ret;
        ret.sum = sum + other.sum;
        ret.L = max(L, sum + other.L);
        ret.R = max(other.R, other.sum + R);
        ret.best = max({L + other.R, best + other.sum, sum + other.best});
        return ret;
    }
} st[2000010];
 
void build(int id, int L, int R) {
    if (L == R) {
        if (s[L - 1] == 'T') st[id] = {1, 1, 1, 1};
        else st[id] = {0, 0, -1, 0};
        return;
    }
    int mid = L + R >> 1;
    build(id * 2, L, mid);
    build(id * 2 + 1, mid + 1, R);
    st[id] = st[id * 2] + st[id * 2 + 1];
}
 
node get(int id, int L, int R, int u, int v) {
    if (u <= L && R <= v) return st[id];
    int mid = L + R >> 1;
    if (v <= mid) return get(id * 2, L, mid, u, v);
    if (u > mid) return get(id * 2 + 1, mid + 1, R, u, v);
    return get(id * 2, L, mid, u, v) + get(id * 2 + 1, mid + 1, R, u, v);
}

void solve(){
    cin >> n;
    cin >> s;
    build(1, 1, n);
    cin >> q;
    while (q--) {
        int l, r;
        cin >> l >> r;
        cout << get(1, 1, n, l, r).best << '\n';
    }
}
signed main(){
	ios_base::sync_with_stdio(0); cin.tie(0);
	solve();
}

Compilation message

election.cpp: In function 'void build(long long int, long long int, long long int)':
election.cpp:149:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  149 |     int mid = L + R >> 1;
      |               ~~^~~
election.cpp: In function 'node get(long long int, long long int, long long int, long long int, long long int)':
election.cpp:157:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  157 |     int mid = L + R >> 1;
      |               ~~^~~

Subtask #1
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 2 ms 468 KB Output is correct
5 Correct 2 ms 468 KB Output is correct

Subtask #2
54.0 / 54.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 2 ms 468 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 52 ms 9292 KB Output is correct
7 Correct 45 ms 9828 KB Output is correct
8 Correct 51 ms 9744 KB Output is correct
9 Correct 38 ms 9820 KB Output is correct
10 Correct 50 ms 9828 KB Output is correct
11 Correct 58 ms 9944 KB Output is correct
12 Correct 53 ms 9944 KB Output is correct
13 Correct 59 ms 9976 KB Output is correct
14 Correct 44 ms 10060 KB Output is correct
15 Correct 47 ms 9836 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 2 ms 468 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 52 ms 9292 KB Output is correct
7 Correct 45 ms 9828 KB Output is correct
8 Correct 51 ms 9744 KB Output is correct
9 Correct 38 ms 9820 KB Output is correct
10 Correct 50 ms 9828 KB Output is correct
11 Correct 58 ms 9944 KB Output is correct
12 Correct 53 ms 9944 KB Output is correct
13 Correct 59 ms 9976 KB Output is correct
14 Correct 44 ms 10060 KB Output is correct
15 Correct 47 ms 9836 KB Output is correct
16 Correct 441 ms 43340 KB Output is correct
17 Correct 398 ms 42968 KB Output is correct
18 Correct 373 ms 43404 KB Output is correct
19 Correct 351 ms 42744 KB Output is correct
20 Correct 461 ms 42420 KB Output is correct
21 Correct 443 ms 44488 KB Output is correct
22 Correct 436 ms 44212 KB Output is correct
23 Correct 445 ms 44440 KB Output is correct
24 Correct 506 ms 43976 KB Output is correct
25 Correct 456 ms 43596 KB Output is correct