P6337 [COCI 2007/2008 #2] CRNE - 洛谷

#include<bits/stdc++.h>
using namespace std;
int main(){int n;cin>>n;//横加竖 最大。n/2,n/2+1if(n%2==0){cout<<(n/2+1)*(n/2+1);}else   cout<<(n/2+2)*(n/2+1);return 0;
}

P6338 [COCI 2007/2008 #2] PRVA - 洛谷

#include<bits/stdc++.h>
using namespace std;
char a[25][25];
int main(){int r,c;string mins="zz",t;cin>>r>>c;for(int i=1;i<=r;i++){for(int j=1;j<=c;j++){cin>>a[i][j];}}for(int i=0;i<=r;i++)   a[i][0]='#';for(int i=0;i<=c;i++)   a[0][i]='#';for(int i=1;i<=r;i++){for(int j=1;j<=c;j++){if(a[i][j]>='a'&&a[i][j]<='z'&&a[i][j-1]=='#'){t="";for(int z=j;z<=c;z++){if(a[i][z]!='#')    t+=a[i][z];else break;}if(t.size()>=2) mins=min(t,mins);}if(a[i][j]>='a'&&a[i][j]<='z'&&a[i-1][j]=='#'){t="";for(int z=i;z<=r;z++){if(a[z][j]!='#')    t+=a[z][j];else break;}if(t.size()>=2) mins=min(t,mins);}}}cout<<mins;return 0;
}

P6352 [COCI 2007/2008 #3] CETIRI - 洛谷

#include<bits/stdc++.h>
using namespace std;
int a[5];
int main(){for(int i=0;i<3;i++){cin>>a[i];}sort(a,a+3);int d1=a[1]-a[0],d2=a[2]-a[1];if(d1*2==d2){cout<<a[1]+d1;}else if(d1==2*d2)  cout<<a[0]+d2;else if(d1==d2) cout<<a[2]+d2;return 0;
}

P6367 [COCI 2006/2007 #6] PRASE - 洛谷

#include<bits/stdc++.h>
using namespace std;
string s[110];
int f[110];
int main(){int n,ans,cnt=0;cin>>n;for(int i=0;i<n;i++){cin>>s[i];ans=0;for(int j=0;j<i;j++){if(s[i]==s[j])  ans++;//数前边这个人取了多少份}if(i-ans<ans) cnt++;}cout<<cnt;return 0;
}

P6382 『MdOI R2』Car - 洛谷

#include<bits/stdc++.h>
using namespace std;
int r[6];
int main(){string s;int wei;cin>>s;if(s[0]=='M'&&s[1]=='D'&&s[2]=='A'){for(int i=s.size()-1;i>2;i--){if(s[i]>='0'&&s[i]<='9'){wei=int(s[i]-'0');break;}}if(wei==1||wei==9)  r[1]=1;else if(wei==2||wei==8) r[2]=1;else if(wei==3||wei==7) r[3]=1;else if(wei==4||wei==6) r[4]=1;else    r[5]=1;}else{for(int i=1;i<=5;i++)   r[i]=1;}for(int i=1;i<=5;i++)   cout<<r[i]<<" ";return 0;
}

P6386 [COCI 2007/2008 #4] VAUVAU - 洛谷

#include<bits/stdc++.h>
using namespace std;
int main(){int a,b,c,d,p,m,g,flag=0;cin>>a>>b>>c>>d>>p>>m>>g;int y=p%(a+b),yy=p%(c+d),s=m%(a+b),ss=m%(c+d),l=g%(a+b),ll=g%(c+d);if(y>0&&y<=a&&yy<=c&&yy>0)   cout<<"both"<<endl;else if(y>0&&y<=a&&yy>c||y>a&&yy<=c&&yy>0)   cout<<"one"<<endl;else    cout<<"none"<<endl;if(s>0&&s<=a&&ss<=c&&ss>0)   cout<<"both"<<endl;else if(s>0&&s<=a&&ss>c||s>a&&ss<=c&&ss>0)   cout<<"one"<<endl;else    cout<<"none"<<endl;if(l>0&&l<=a&&ll<=c&&ll>0)   cout<<"both"<<endl;else if(l>0&&l<=a&&ll>c||l>a&&ll<=c&&ll>0)   cout<<"one"<<endl;else    cout<<"none"<<endl;return 0;
}

P6408 [COCI 2008/2009 #3] PET - 洛谷

#include<bits/stdc++.h>
using namespace std;
int q[6];
int main(){int a,b,c,d,cnt,maxs=0;for(int i=1;i<=5;i++){cin>>a>>b>>c>>d;q[i]=a+b+c+d;}for(int i=1;i<=5;i++){if(q[i]>maxs)   maxs=q[i],cnt=i;}cout<<cnt<<" "<<maxs;return 0;
}

B3706 [语言月赛202302] 晚秋绝诗 - 洛谷

#include<bits/stdc++.h>
using namespace std;
int main(){long double x,z,c;cin>>x>>z>>c;cout<<ceil((x-z*2)/c)<<endl;return 0;
}

B3707 [语言月赛202302] 风神瞳 - 洛谷

#include<bits/stdc++.h>
using namespace std;
int main(){int p,x,y,xx,yy,flag=0;cin>>p>>x>>y>>xx>>yy;if(p==1){if(x==xx||y==yy)    flag=1;}else if(p==2){if(x==xx&&abs(y-yy)>1||y==yy&&abs(x-xx)>1)  flag=1;}else if(p==3){if(x+2==xx&&y+1==yy||x+2==xx&&y-1==yy||x-2==xx&&y+1==yy||x-2==xx&&y-1==yy||x+1==xx&&y+2==yy||x+1==xx&&y-2==yy||x-1==xx&&y+2==yy||x-1==xx&&y-2==yy)flag=1;}else if(p==4){if(x+2==xx&&y+2==yy||x+2==xx&&y-2==yy||x-2==xx&&y+2==yy||x-2==xx&&y-2==yy)flag=1;}if(flag)    cout<<"Yes";else    cout<<"No";return 0;
}

B3710 [语言月赛202302] 破碎的历史 - 洛谷

#include<bits/stdc++.h>
using namespace std;
int main(){double s;long long ss,a,b,c,d,ans=0;cin>>s;ss=s*100000000;for(int i=0;i<101;i++){for(int j=0;j<101;j++){for(int x=0;x<101;x++){for(int z=0;z<101;z++){if(ss==(100-i)*(100-j)*(100-x)*(100-z)) ans++;}}}}cout<<ans;return 0;
}

B3719 [语言月赛202303] Factorial B - 洛谷

#include<bits/stdc++.h>
using namespace std;
int main(){long long n;cin>>n;if(n<4) cout<<"No";else    cout<<"Yes";return 0;
}

B3720 [语言月赛202303] Out for Dinner B - 洛谷

#include<bits/stdc++.h>
using namespace std;
int main(){long long x;char a,b;cin>>x>>a>>b;if(a=='B'&&b!='C'||b=='B'&&a!='C')  cout<<8*x/10;else if(a!='B'&&b=='C'||b!='B'&&a=='C') cout<<7*x/10;else if(a=='B'&&b=='C'||b=='B'&&a=='C') cout<<6*x/10;else cout<<x;return 0;
}

B3721 [语言月赛202303] Stone Gambling S - 洛谷

#include<bits/stdc++.h>
using namespace std;
int main(){long long x,y,tmp;int t;cin>>t;for(int i=0;i<t;i++){cin>>x>>y;while(x!=0&&y!=0){if(x<y){x+=1;}else{tmp=x;while(x>tmp/2)  x--;}if(x==0||y==0)  break;if(y<x) y+=1;else{tmp=y;while(y>tmp/2)  y--;}}cout<<x<<" "<<y<<endl;}return 0;
}

B3722 [语言月赛202303] Milk Sales S - 洛谷

#include<bits/stdc++.h>
using namespace std;
int a[100010],b[100010];
int main(){int n;long long suma=0,sumb=0;cin>>n;for(int i=1;i<=n;i++)   cin>>a[i];for(int i=1;i<=n;i++)   cin>>b[i];for(int i=1;i<=n;i++){suma+=a[i],sumb+=b[i];if(sumb>suma){cout<<i;return 0;}}
}

错题重练

B3639 T2 点亮灯笼 - 洛谷

#include<iostream>
#include<bits/stdc++.h>
using namespace std;
bool q[1010];
int main(){int n,m,x;cin>>n>>m;for(int i=0;i<m;i++){cin>>x;if(x==n)    q[x-1]=!q[x-1],q[x]=!q[x],q[1]=!q[1];else if(x==1)   q[x+1]=!q[x+1],q[x]=!q[x],q[n]=!q[n];else    q[x-1]=!q[x-1],q[x]=!q[x],q[x+1]=!q[x+1];}for(int i=1;i<=n;i++)   cout<<q[i]<<" ";return 0;
}

P4326 [COCI 2006/2007 #1] Herman - 洛谷

#include<bits/stdc++.h>
using namespace std;
int main(){double r;cin>>r;printf("%0.6lf\n%0.6lf",M_PI*r*r,2*r*r);return 0;
}

B3653 [语言月赛202208] 俊俏地鼠的远亲 - 洛谷

#include<bits/stdc++.h>
using namespace std;
long long q[55][55];
int main(){int n,m;long long max_d=0,dis;cin>>n>>m;for(int i=1;i<=n;i++){for(int j=1;j<=m;j++){cin>>q[i][j];}}for(int i=1;i<=n;i++){for(int j=1;j<=m;j++){max_d=0;for(int k=1;k<=n;k++){for(int z=1;z<=m;z++){if(q[i][j]==q[k][z]){dis=(i-k)*(i-k)+(j-z)*(j-z);if(dis>max_d)   max_d=dis;}}}cout<<max_d<<" ";}cout<<endl;}return 0;
}

P4445 [AHOI2018初中组] 报名签到 - 洛谷

#include<bits/stdc++.h>
using namespace std;
int q[100010];
int main(){int n,ans=0;cin>>n;for(int i=0;i<n;i++)    cin>>q[i];for(int i=1;i<n;i++){ans+=max(q[i-1],q[i]);}cout<<ans;return 0;
}

P4702 取石子 - 洛谷

#include<bits/stdc++.h>
using namespace std;
int q[100010];
int main(){long long sum=0;int n,a;cin>>n;for(int i=0;i<n;i++){cin>>a;sum+=a;}sum%=10;if(sum%2==1)    cout<<"Alice";else    cout<<"Bob";return 0;
}

P5082 成绩 - 洛谷

#include<bits/stdc++.h>
using namespace std;
int main(){double ans;long long man=0,de=0;int n,x;cin>>n;for(int i=0;i<n;i++){cin>>x;man+=x;}for(int i=0;i<n;i++){cin>>x;de+=x;}ans=1.0*(man*3-de*2)/(man-de);printf("%0.6lf",ans);return 0;
}

P5534 【XR-3】等差数列 - 洛谷

#include<bits/stdc++.h>
using namespace std;
int main(){long long a1,a2,n;cin>>a1>>a2>>n;long long ans=n*(2*a1+(n-1)*(a2-a1))/2;cout<<ans;return 0;
}

B3658 [语言月赛202209] 口算练习 - 洛谷

#include<bits/stdc++.h>
using namespace std;
int main(){int x,y;cin>>x>>y;if(x/y<0){if(x%y==0)  cout<<x/y;else    cout<<int(1.0*x/y-1);}else    cout<<x/y;return 0;
}