結果

問題 No.1299 Random Array Score
ユーザー y61mpnly61mpnl
提出日時 2020-11-27 22:23:56
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 31 ms / 2,000 ms
コード長 546 bytes
コンパイル時間 2,186 ms
コンパイル使用メモリ 191,300 KB
最終ジャッジ日時 2025-01-16 07:46:37
ジャッジサーバーID
(参考情報)
judge2 / judge5
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ファイルパターン 結果
sample AC * 3
other AC * 34
権限があれば一括ダウンロードができます
コンパイルメッセージ
main.cpp: In function ‘int main()’:
main.cpp:18:15: warning: format ‘%lld’ expects argument of type ‘long long int*’, but argument 2 has type ‘ll*’ {aka ‘long int*’} [-Wformat=]
   18 |     scanf("%lld %lld", &n, &k);
      |            ~~~^        ~~
      |               |        |
      |               |        ll* {aka long int*}
      |               long long int*
      |            %ld
main.cpp:18:20: warning: format ‘%lld’ expects argument of type ‘long long int*’, but argument 3 has type ‘ll*’ {aka ‘long int*’} [-Wformat=]
   18 |     scanf("%lld %lld", &n, &k);
      |                 ~~~^       ~~
      |                    |       |
      |                    |       ll* {aka long int*}
      |                    long long int*
      |                 %ld
main.cpp:22:19: warning: format ‘%lld’ expects argument of type ‘long long int*’, but argument 2 has type ‘ll*’ {aka ‘long int*’} [-Wformat=]
   22 |         scanf("%lld", &a);
      |                ~~~^   ~~
      |                   |   |
      |                   |   ll* {aka long int*}
      |                   long long int*
      |                %ld
main.cpp:28:16: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 2 has type ‘ll’ {aka ‘long int’} [-Wformat=]
   28 |     printf("%lld\n", ans);
      |             ~~~^     ~~~
      |                |     |
      |                |     ll {aka long int}
      |                long long int
      |             %ld
main.cpp:18:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   18 |     scanf("%lld %lld", &n, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~
main.cpp:22:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   22 |         scanf("%lld", &a);
      |         ~~~~~^~~~~~~~~~~

ソースコード

diff #

#include<bits/stdc++.h>
#define REP(i,b,e) for(int i=b;i<e;i++)
using ll = int_fast64_t;
const ll MOD = 998244353;

ll modpow(ll a, ll p, ll m){
    ll ret = 1;
    while(p){
        if(p&1) ret = ret * a % m;
        a = a * a % m;
        p >>= 1;
    }
    return ret;
}

int main(){
    ll n, k;
    scanf("%lld %lld", &n, &k);
    ll sum = 0;
    REP(i, 0, n){
        ll a;
        scanf("%lld", &a);
        sum = (sum + a) % MOD;
    }

    ll ans = modpow(2, k, MOD);
    ans = ans * sum % MOD;
    printf("%lld\n", ans);
    return 0;
}
0