Submission #1540673

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;

#ifdef LOCAL
#define eprintf(...) fprintf(stderr, __VA_ARGS__)
#define print_var(x) cerr << #x << " = " << x << endl
#define print_array(arr, len) {cerr << #arr << " = "; for (int i = 0; i < len; i++) cerr << arr[i] << " "; cerr << endl;}
#define print_iterable(it) {cerr << #it << " = "; for (const auto &e : it) cerr << e << " "; cerr << endl;}
#else
#define eprintf(...) (void)0
#define print_var(x) (void)0
#define print_array(arr, len) (void)0
#define print_iterable(it) (void)0
#endif

using ll = long long;
const int N = 200500;

int n;
char s[N];
int cnt[N];

void solve()
{
    scanf("%s", s);
    n = strlen(s);

    for (int i = 0; i < n; i++)
        cnt[s[i] - 'a']++;
    ll ans = 0;
    for (int i = 0; i < 26; i++)
        ans += (ll)cnt[i] * (n - cnt[i]);
    ans /= 2;
    ans++;

    printf("%lld\n", ans);
}

int main()
{
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
#endif

    solve();

    eprintf("\n\ntime = %.3lf\n", (double)clock() / CLOCKS_PER_SEC);
}

Submission Info

Compile Error

./Main.cpp: In function ‘void solve()’:
./Main.cpp:25:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%s", s);
                   ^

Judge Result