結果

問題 No.49 算数の宿題
ユーザー shihu
提出日時 2024-09-30 21:12:53
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 2 ms / 5,000 ms
コード長 2,313 bytes
コンパイル時間 4,907 ms
コンパイル使用メモリ 286,216 KB
最終ジャッジ日時 2025-02-24 14:20:04
ジャッジサーバーID
(参考情報)
judge2 / judge4
このコードへのチャレンジ
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ファイルパターン 結果
other AC * 10
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:60:13: warning: ‘e’ may be used uninitialized [-Wmaybe-uninitialized]
   60 |             if (e == '+') ans *= now;
      |             ^~
main.cpp:50:10: note: ‘e’ was declared here
   50 |     char e;
      |          ^

ソースコード

diff #
プレゼンテーションモードにする

// #pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using mint = modint998244353;
// using mint = modint1000000007;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using T = tuple<int, int, int>;
using G = vector<vector<int>>;
#define rep(i, n) for (ll i = 0; i < (n); ++i)
#define rep2(i, a, b) for (ll i = a; i < (b); ++i)
#define rrep2(i, a, b) for (ll i = a-1; i >= (b); --i)
#define rep3(i, a, b, c) for (ll i = a; i < (b); i+=c)
#define rng(a) a.begin(),a.end()
#define rrng(a) a.rbegin(),a.rend()
#define popcount __builtin_popcount
#define popcountll __builtin_popcountll
#define fi first
#define se second
#define UNIQUE(v) sort(rng(v)), v.erase(unique(rng(v)), v.end())
#define MIN(v) *min_element(rng(v))
#define MAX(v) *max_element(rng(v))
#define SUM(v) accumulate(rng(v),0)
#define IN(v, x) (find(rng(v),x) != v.end())
template<class T> bool chmin(T &a,T b){if(a>b){a=b;return 1;}else return 0;}
template<class T> bool chmax(T &a,T b){if(a<b){a=b;return 1;}else return 0;}
template<class T> void printv(vector<T> &v){rep(i,v.size())cout<<v[i]<<" \n"[i==v.size()-1];}
template<class T> void printvv(vector<vector<T>> &v){rep(i,v.size())rep(j,v[i].size())cout<<v[i][j]<<" \n"[j==v[i].size()-1];cout<<endl;}
const ll dx[] = {0, 1, 0, -1};
const ll dy[] = {1, 0, -1, 0};
const ll dxx[] = {0, 1, 0, -1, 1, -1, 1, -1};
const ll dyy[] = {1, 0, -1, 0, 1, 1, -1, -1};
const ll LINF = 1001002003004005006ll;
const int INF = 1001001001;
int main(){
ios::sync_with_stdio(false);
cin.tie(nullptr);
string s; cin >> s;
int n = s.size();
ll ans = 0;
ll now = 0, start = 0;
char e;
rep(i, n){
if (s[i] == '*' || s[i] == '+'){
start = i;
break;
}
ans = ans*10+(s[i]-'0');
}
rep2(i, start, n){
if (s[i] == '*' || s[i] == '+'){
if (e == '+') ans *= now;
else ans += now;
e = s[i];
now = 0;
continue;
}
now = now*10+(s[i]-'0');
}
if (e == '+') ans *= now;
else ans += now;
cout << ans << endl;
return 0;
}
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