4 条题解
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3赵青海 (huhe) LV 7 SU @ 2022-1-8 20:13:02
#include <stdio.h> int n; int main() { scanf("%d",&n); long long ans = n; if(ans%2==1) { ans = ans+1; ans/=2; ans *= n; } else { ans /=2; ans *= (n+1); } for(int i = 0,x;i < n - 1;i++) { scanf("%d",&x); ans -= x; } printf("%lld\n",ans); return 0; }
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02024-4-21 14:52:03@
/* int %d longlong %lld float %f double %lf char %c char[] %s 'a'=97 'z'=122 'A'=65 'Z'=90 '0'=48 '9'=57 */ #include <cstdio> using namespace std; const int N=1e7+10; const int INF=0x3f3f3f3f; const double pi=3.1416; int n,x,ans; int main(){ scanf("%d",&n); for(int i=1;i<n;i++){ scanf("%d",&x); ans^=x; } for(int i=1;i<=n;i++){ ans^=i; } printf("%d",ans); return 0; }
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-12022-2-11 21:07:01@
#include<stdio.h>//节省空间 int main(){ int n; scanf("%d",&n); int ans=n; for(int i=1,x;i<n;i++){ scanf("%d",&x); ans=ans^x^i;//^是异或 } printf("%d",ans); return 0; }
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-12022-1-8 20:13:24@
#include <stdio.h> int main() { int n,ans; scanf("%d",&n); ans = n; for(int i = 1 , x ; i < n ; i++) { scanf("%d",&x); ans = ans ^x ^ i; } printf("%d\n",ans); }
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信息
- ID
- 1138
- 时间
- 1000ms
- 内存
- 20MiB
- 难度
- 7
- 标签
- 递交数
- 461
- 已通过
- 106
- 上传者