Submission #888488

#	Time	Username	Problem	Language	Result	Execution time	Memory
888488		fanwen	Bliskost (COI23_bliskost)	C++17	100 / 100	153 ms	21992 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#define fi first
#define se second
#define ll long long
#define file(name)                  \
    if(fopen(name".inp", "r"))      \
        freopen(name".inp", "r", stdin), freopen(name".out", "w", stdout); 

const int MAX = 1e6 + 5;

int n, a[MAX], b[MAX], q;
long long sum[2];

bool check() {
	return (sum[0] - sum[1]) % 26 == 0;
}

void you_make_it(void) {
    cin >> n >> q;
    for (int i = 1; i <= n; ++i) {
    	char x; cin >> x; a[i] = x - 'a';
    	sum[i & 1] -= a[i];
    }
    for (int i = 1; i <= n; ++i) {
    	char x; cin >> x; b[i] = x - 'a';
    	sum[i & 1] += b[i];
    }

    cout << (check() ? "da" : "ne") << '\n';
    while(q--) {
    	int p; char x; cin >> p >> x;
    	sum[p & 1] += a[p];
    	a[p] = x - 'a';
    	sum[p & 1] -= a[p];
	    cout << (check() ? "da" : "ne") << '\n';

    }
}

signed main() {

#ifdef LOCAL
    freopen("TASK.inp", "r", stdin);
    freopen("TASK.out", "w", stdout);
#endif
    file("bliskost");
    auto start_time = chrono::steady_clock::now();

    cin.tie(0), cout.tie(0) -> sync_with_stdio(0);

    you_make_it();

    auto end_time = chrono::steady_clock::now();

    cerr << "\nExecution time : " << chrono::duration_cast <chrono::milliseconds> (end_time - start_time).count() << "[ms]" << endl;

    return (0 ^ 0);
}

// Dream it. Wish it. Do it.

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:10:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |         freopen(name".inp", "r", stdin), freopen(name".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:49:5: note: in expansion of macro 'file'
   49 |     file("bliskost");
      |     ^~~~
Main.cpp:10:49: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |         freopen(name".inp", "r", stdin), freopen(name".out", "w", stdout);
      |                                          ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:49:5: note: in expansion of macro 'file'
   49 |     file("bliskost");
      |     ^~~~

• Subtask 1: 7 / 7
• Subtask 2: 8 / 8
• Subtask 3: 13 / 13
• Subtask 4: 12 / 12
• Subtask 5: 17 / 17
• Subtask 6: 43 / 43