Submission #1338791

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Source Code Expand

#include "bits/stdc++.h"
#define MOD 1000000007
#define INF 11234567890
#define in std::cin
#define out std::cout
#define rep(i,N) for(LL i=0;i<N;++i)
typedef long long int LL;

std::string S;
bool nextI = true;
int ans;

int main()
{
	in >> S;

	rep(i, S.length())
	{
		if (nextI)
		{
			if (S[i] == 'I')
			{
				++ans;
				nextI = false;
			}
		}
		else
		{
			if (S[i] == 'O')
			{
				++ans;
				nextI = true;
			}
		}
	}
	if (nextI) { --ans; }

	out << ans << std::endl;
	return 0;
}

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