제출 #412064

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
412064		LptN21	Unija (COCI17_unija)	C++14	100 / 100	331 ms	54416 KiB

unija

#include <bits/stdc++.h>
using namespace std;
#define fastIO ios_base::sync_with_stdio(false), cin.tie(NULL), cout.tie(NULL);
#define FF first
#define SS second
#define pb push_back
#define sz(x) (int)x.size()
#define oo 1e9
#define PI acos(-1.0)
#define lb lower_bound
#define ub upper_bound
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> ii;
typedef pair<ii, ii> Li;
const int N = 1e6+7, M=1e7+7;
const int MOD = 1e9+7;

int n, m, k, t;

int h[M];

signed main() {
    //freopen("test.inp", "r", stdin);
    //freopen("test.out", "w", stdout);
    //fastIO;
    scanf("%d", &n);int x, y;ll ans=0;
    memset(h, 0, sizeof h);
    for(int i=1;i<=n;i++) {
        scanf("%d%d", &x, &y);
        h[y>>1]=max(h[y>>1], x);
    }
    for(int mx=0, i=M-1;i>0;i--)
        mx=max(h[i], mx), ans+=mx;
    printf("%lld", ans<<1LL);
    return 0;
}
/* stuff you should look for
    - int overflow, array bounds
    - special cases (n=1?)
    - do smth instead of do nothing and stay organized
    - WRITE STUFF DOWN
    - DONT JUST STICK ON ONE APPROACH
*/

컴파일 시 표준 에러 (stderr) 메시지

unija.cpp: In function 'int main()':
unija.cpp:27:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |     scanf("%d", &n);int x, y;ll ans=0;
      |     ~~~~~^~~~~~~~~~
unija.cpp:30:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |         scanf("%d%d", &x, &y);
      |         ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10