Submission #39376

#	Time	Username	Problem	Language	Result	Execution time	Memory
39376		Extazy	Money (IZhO17_money)	C++14	0 / 100	0 ms	6084 KiB

money

#include <bits/stdc++.h>
#define endl '\n'
#define prev vahgkjahjka
#define next hajhqkjjkqkjq

using namespace std;

const int N = 1000007;

int n,a[N],ans;
vector < int > curr;
multiset < int > s;

multiset < int >::iterator prev(multiset < int >::iterator it) {
    --it;
    return it;
}

bool are_consecutive(int v1, int v2) {
    if(v1==v2) return true;
    return *prev(s.lower_bound(v2))==v1; 
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int i,j;

    scanf("%d", &n);
    for(i=1;i<=n;i++) {
        scanf("%d", &a[i]);
        s.insert(a[i]);
    }

    for(i=n;i>=1;) {
        vector < int > curr;
        curr.push_back(a[i]);
        for(j=i-1;j>=1;j--) {
            if(are_consecutive(a[j],a[j+1])) {
                curr.push_back(a[j]);
            }
            else {
                break;
            }
        }
        for(j=0;j<(int)(curr.size());j++) {
            s.erase(s.find(curr[j]));
        }
        i-=(int)(curr.size());
        ++ans;
    }

    printf("%d\n", ans);

    return 0;
}

Compilation message (stderr)

money.cpp: In function 'int main()':
money.cpp:29:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
                    ^
money.cpp:31:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &a[i]);
                           ^

• Subtask 1: 0 / 9
• Subtask 2: 0 / 16
• Subtask 3: 0 / 20
• Subtask 4: 0 / 55