Submission #5023348

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Source Code Expand

#define _CRT_SECURE_NO_WARNINGS
#include "bits/stdc++.h"
using namespace std;
#define rep(i, n) for(int i=0; i<(n); ++i)
#define FOR(i, m, n) for(int i=(m); i<(n); ++i)
#define sz(x) ((int)(x).size())
#define all(x) (x).begin(),(x).end()
#define mp make_pair
#define pb push_back
#define Cout(x) cout << (x) << endl
#define dump(x) cerr << #x << " = " << (x) << endl;
typedef long long LL;
typedef vector<int> VI;
typedef vector<long long> VL;
typedef vector<string> VS;
typedef vector<vector<int>> VVI;
typedef pair<int, int> PII;
const int inf = (int)1e9;
const long long mod = (long long)1e9 + 7;
const double pi = acos(-1.0);

int check(string s) {
	int re = 0;

	if (s[0] == 'O')s.erase(0, 1);
	if (sz(s) > 1 && s[sz(s) - 1] == 'O')s.erase(sz(s) - 1, 1);

	if (sz(s) > 2 && count(all(s), 'O') && s[0] == 'I' && s[sz(s) - 1]) {
		return sz(s);
	}
	else {
		return 0;
	}
}

int main() {
	string s; cin >> s;
	s.erase(unique(all(s)), s.end());
	Cout(check(s));
}

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