(AtCoder Beginner Contest 291: A - camel Case)

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思维

#include <bits/stdc++.h>

using i64 = long long;


int main() {
	std::ios::sync_with_stdio(false);
	std::cin.tie(nullptr);

	std::string s;
	std::cin >> s;

	auto ans = 1 + std::find_if(s.begin(), s.end(), isupper) - s.begin();
	std::cout << ans << "\n";
	
	return 0;
}