oj.uz

답안 #414726

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
414726 2021-05-31T05:55:02 Z juggernaut The Xana coup (BOI21_xanadu) C++17
10 / 100
 44 ms 1980 KB 
#include<bits/stdc++.h>
#define fr first
#define sc second
using namespace std;
void usaco(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
typedef long long ll;
#define USING_ORDERED_SET 0
#if USING_ORDERED_SET
#include<bits/extc++.h>
using namespace __gnu_pbds;
template<class T>using ordered_set=tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
#endif
template<class T>void umax(T &a,T b){if(a<b)a=b;}
template<class T>void umin(T &a,T b){if(b<a)a=b;}
#ifdef IOI2021SG
    #define printl(args...)printf(args)
#else
    #define printl(args...)((void)0)
#endif
int a[100005];
int main(){
    int n;
    scanf("%d",&n);
    for(int i=1,x;i<n;i++)scanf("%d%d",&x,&x);
    for(int i=1;i<=n;i++)scanf("%d",&a[i]);
    int cnt=0;
    for(int i=2;i<=n;i++){
        if(a[i-1]==1){
            cnt++;
            a[i]^=1;
            a[i+1]^=1;
        }
    }
    if(a[n]==1)puts("impossible");
    else printf("%d",cnt);
}

Compilation message

xanadu.cpp: In function 'void usaco(std::string)':
xanadu.cpp:5:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | void usaco(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
xanadu.cpp:5:66: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | void usaco(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
      |                                                           ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
xanadu.cpp: In function 'int main()':
xanadu.cpp:23:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
xanadu.cpp:24:32: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |     for(int i=1,x;i<n;i++)scanf("%d%d",&x,&x);
      |                           ~~~~~^~~~~~~~~~~~~~
xanadu.cpp:25:31: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |     for(int i=1;i<=n;i++)scanf("%d",&a[i]);
      |                          ~~~~~^~~~~~~~~~~~

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 31 ms 660 KB Output is correct
2 Correct 44 ms 1876 KB Output is correct
3 Correct 43 ms 1940 KB Output is correct

Subtask #4
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 33 ms 660 KB Output is correct
2 Correct 31 ms 1932 KB Output is correct
3 Correct 33 ms 1944 KB Output is correct
4 Correct 28 ms 1812 KB Output is correct
5 Correct 31 ms 1932 KB Output is correct
6 Correct 31 ms 1980 KB Output is correct
7 Incorrect 1 ms 204 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -