Submission #156109

#	Time	Username	Problem	Language	Result	Execution time	Memory
156109		karma	JOIOJI (JOI14_joioji)	C++14	100 / 100	45 ms	6216 KiB

joioji

#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define FileName      "test"
#define ll            long long
#define pb            emplace_back
#define mp            make_pair
#define fi            first
#define se            second

using namespace std;
using namespace __gnu_pbds;

typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> ord_set;
typedef pair<int, int> pii;

const int N = int(1e3) + 2;

int n, curi, curj, curo, res = 0;
pii cur;
string s;
map<pii, int> mmap;

void Enter() {
     cin >> n >> s; curi = curj = curo = 0;
     cur = mp(0, 0); mmap[cur] = -1;
     for(int i = 0; i < n; ++i) {
        if(s[i] == 'O') ++curo;
        else if(s[i] == 'J') ++curj;
        else ++curi;
        cur = mp(curo - curi, curj - curo);
        if(mmap.count(cur)) {
            res = max(res, i - mmap[cur]);
            //cout << mmap[cur] << ' ' << i << '\n';
        } else mmap[cur] = i;
     }
     cout << res;
}

void Solve() {

}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    if(fopen(FileName".inp", "r")) {
       freopen(FileName".inp", "r", stdin);
       freopen(FileName".out", "w", stdout);
    }

    Enter(), Solve();

    return 0;
}

Compilation message (stderr)

joioji.cpp: In function 'int main()':
joioji.cpp:49:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
        freopen(FileName".inp", "r", stdin);
        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
joioji.cpp:50:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
        freopen(FileName".out", "w", stdout);
        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 15 / 15
• Subtask 3: 80 / 80