Submission #139704

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
139704	2019-08-01 09:35:38	mlyean00	Growing Vegetable is Fun 3 (JOI19_ho_t3)	C++17	0 / 100	1058 ms	424 KiB

joi2019_ho_t3

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#include <bits/stdc++.h>
#ifdef DEBUG
#include "debug.hpp"
#else
#pragma GCC optimize("Ofast")
#define trace(...)
#include <bits/stdc++.h>
#define endl '\n'
#endif
using namespace std;
const string COL = "RGY";
int count_swaps(string const& s, string const& t) {
    int n = s.length();
    vector<stack<int>> st(3);
    int diff = 0;
    for (int i = n - 1; i >= 0; --i) {
        st[COL.find(t[i])].push(i);
    }
    for (int i = 0; i < n; ++i) {
        int c = COL.find(s[i]);
        if (st[c].empty()) return INT_MAX;
        diff += abs(st[c].top() - i);
        st[c].pop();
    }
    assert(diff % 2 == 0);
 
 
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