oj.uz

Submission #367589

# Submission time Handle Problem Language Result Execution time Memory
367589 2021-02-17T17:33:30 Z ritul_kr_singh Sure Bet (CEOI17_sure) C++17
100 / 100
 39 ms 3692 KB 
//#pragma GCC optimize("Ofast,unroll-loops")
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define sp << " " <<
#define nl << "\n"

int a[100000], b[100000], bet = 10000;

int f(int i, int j){
    return min(a[i]-(j+1)*bet, b[j]-(i+1)*bet);
}

signed main(){
    ios_base::sync_with_stdio(false); cin.tie(nullptr);
    int n; cin >> n;
    for(int i=0; i<n; ++i){
        string inp0, inp1; cin >> inp0 >> inp1;
        int i0 = 0, i1 = 0;

        int dot = 0;
        for(int j=0; j<inp0.size(); ++j) if(inp0[j]=='.') dot = j;
        if(!dot){
            inp0 += ".0000";
        }else{
            dot = 4-(inp0.size()-dot-1);
            for(int j=0; j<dot; ++j) inp0 += "0";
        }

        dot = 0;
        for(int j=0; j<inp1.size(); ++j) if(inp1[j]=='.') dot = j;

        if(!dot){
            inp1 += ".0000";
        }else{
            dot = 4-(inp1.size()-dot-1);
            for(int j=0; j<dot; ++j) inp1 += "0";
        }
        for(char j : inp0){
            if(j=='.') continue;
            i0 *= 10LL;
            i0 += (j-'0');
        }
        for(char j : inp1){
            if(j=='.') continue;
            i1 *= 10LL;
            i1 += (j-'0');
        }
        a[i] = i0 - bet;
        b[i] = i1 - bet;
    }
    sort(a, a+n, greater<>());
    sort(b, b+n, greater<>());
    for(int i=1; i<n; ++i){
        a[i] += a[i-1];
        b[i] += b[i-1];
    }
    int ans = 0, sub = 0;

    int i = 0, j = 0;
    while(i < n and j < n){
        while(i+1<n and f(i+1, j) >= f(i, j)) ++i;
        ans = max(ans, f(i, j));
        ++j;
    }
    double out = (double)ans;
    out /= 10000.0;
    cout << fixed << setprecision(4);
    cout << out nl;
}

Compilation message

sure.cpp: In function 'int main()':
sure.cpp:22:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |         for(int j=0; j<inp0.size(); ++j) if(inp0[j]=='.') dot = j;
      |                      ~^~~~~~~~~~~~
sure.cpp:31:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |         for(int j=0; j<inp1.size(); ++j) if(inp1[j]=='.') dot = j;
      |                      ~^~~~~~~~~~~~
sure.cpp:58:18: warning: unused variable 'sub' [-Wunused-variable]
   58 |     int ans = 0, sub = 0;
      |                  ^~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 36 ms 3292 KB Output is correct
18 Correct 36 ms 3308 KB Output is correct
19 Correct 37 ms 3308 KB Output is correct
20 Correct 36 ms 3308 KB Output is correct
21 Correct 39 ms 3692 KB Output is correct
22 Correct 36 ms 3308 KB Output is correct
23 Correct 37 ms 3436 KB Output is correct
24 Correct 37 ms 3308 KB Output is correct
25 Correct 36 ms 3308 KB Output is correct
26 Correct 39 ms 3692 KB Output is correct