競技プログラムになれるための例題問題集らしい。
中学生くらいから対象？
Getting Started - X Cubic
#include<stdio.h>
int main(){
int x;
scanf("%d",&x);
printf("%d\n",x*x*x);
return 0;
}
Getting Started - Rectangle
#include<stdio.h>
int main(){
int a,b;
scanf("%d %d",&a,&b);
printf("%d %d\n",a*b,2*a+2*b);
}
Branch on Condition - Small, Large, or Equal
#include<stdio.h>
int main(){
int a,b;
scanf("%d %d",&a,&b);
printf("a %s b\n",a<b?"<":a>b?">":"==");
}
Branch on Condition - Range
#include<stdio.h>
int main(){
int a,b,c;
scanf("%d %d %d",&a,&b,&c);
printf("%s\n",a<b && b<c ? "Yes":"No");
}
Branch on Condition - Sorting Three Numbers
#include<stdio.h>
int main(){
int a,b,c,t;
scanf("%d %d %d",&a,&b,&c);
if(a>b)t=a,a=b,b=t;
if(b>c)t=b,b=c,c=t;
if(a>b)t=a,a=b,b=t;
printf("%d %d %d\n",a,b,c);
}
Repetitive Processing - Print Many Hello World
#include<stdio.h>
int main(){
for(int i=0;i<1000;i++){
printf("Hello World\n");
}
}
Repetitive Processing - Print Test Cases
#include<stdio.h>
int main(){
int i=1,n;
while(scanf("%d",&n)!=EOF){
if(n==0)break;
printf("Case %d: %d\n",i++,n);
}
}
Repetitive Processing - Swapping Two Numbers
#include<stdio.h>
int main(){
int a,b,t;
while(scanf("%d %d",&a,&b)!=EOF){
if(a==0&&b==0)break;
if(a>b)t=a,a=b,b=t;
printf("%d %d\n",a,b);
}
}
Computation - A / B Problem
#include<stdio.h>
int main(){
int a,b;
scanf("%d %d",&a,&b);
printf("%d %d %lf\n",a/b,a%b,(double)a/b);
}
Computation - Circle
#include<stdio.h>
#include<math.h>
int main(){
double r;
scanf("%lf",&r);
printf("%lf %lf\n",r*r*M_PI,2*r*M_PI);
}
Computation - Simple Calculator
#include<stdio.h>
int main(){
int a,b,c;
char op;
while(scanf("%d %c %d",&a,&op,&b)!=EOF){
if(op=='?')break;
if(op=='+')c=a+b;
if(op=='-')c=a-b;
if(op=='*')c=a*b;
if(op=='/')c=a/b;
printf("%d\n",c);
}
}
Nested Controls I - Print a Rectangle
#include<stdio.h>
int main(){
int a,b;
while(scanf("%d %d",&a,&b)!=EOF){
if(a==0&&b==0)break;
for(int i=0;i<a;i++){
for(int j=0;j<b;j++){
printf("#");
}
printf("\n");
}
printf("\n");
}
}
Nested Controls I - Print a Rectangle
#include<stdio.h>
int main(){
int a,b;
while(scanf("%d %d",&a,&b)!=EOF){
if(a==0&&b==0)break;
for(int i=1;i<=a;i++){
for(int j=1;j<=b;j++){
printf("%s",i==1 || i==a || j==1 || j==b?"#":".");
}
printf("\n");
}
printf("\n");
}
}
Nested Controls I - Print a Chessboard
#include<stdio.h>
int main(){
int a,b;
while(scanf("%d %d",&a,&b)!=EOF){
if(a==0&&b==0)break;
for(int i=0;i<a;i++){
for(int j=0;j<b;j++){
printf("%s",(i+j)%2?".":"#");
}
printf("\n");
}
printf("\n");
}
}
Nested Controls I - Print a Rectangle
#include<stdio.h>
int main(){
int n,a[101],i;
scanf("%d",&n);
for(i=0;i<n;i++)scanf("%d",&a[i]);
for(i--;i>0;i--)printf("%d ",a[i]);
printf("%d\n",a[0]);
}
Array - Finding Missing Cards
#include<stdio.h>
#include<string.h>
int main(){
int cards[4][14],n,t,num;
char c,ws[5]="SHCD";
memset(cards,0,sizeof(cards));
scanf("%d",&n);
while(n--){
scanf("%*c%c",&c);
scanf("%d",&num);
if(c=='S')t=0;
if(c=='H')t=1;
if(c=='C')t=2;
if(c=='D')t=3;
cards[t][num]=1;
}
for(int i=0;i<4;i++){
for(int j=1;j<=13;j++)if(cards[i][j]==0)printf("%c %d\n",ws[i],j);
}
}
Array - Official House
#include<stdio.h>
#include<string.h>
int main(){
int count[4][3][10],n,b,f,r,v;
memset(count,0,sizeof(count));
scanf("%d",&n);
while(n--){
scanf("%d %d %d %d",&b,&f,&r,&v);
count[b-1][f-1][r-1]+=v;
}
for(int i=0;i<4;i++){
for(int j=0;j<3;j++){
for(int k=0;k<9;k++)printf(" %d",count[i][j][k]);
printf(" %d\n",count[i][j][9]);
}
if(i!=3)printf("####################\n");
}
}
Nested Controls II - Grading
#include<stdio.h>
int main(){
int m,f,r;
char c;
while(scanf("%d %d %d",&m,&f,&r)!=EOF){
if(m==-1&&f==-1&&r==-1)break;
if(m==-1||f==-1){
c='F';
}else if(80<=m+f){
c='A';
}else if(65<=m+f){
c='B';
}else if(50<=m+f){
c='C';
}else if(30<=m+f){
c='D';
if(50<=r)c='C';
}else{
c='F';
}
printf("%c\n",c);
}
}
Nested Controls II - How many ways?
#include<stdio.h>
int main(){
int n,s;
while(scanf("%d %d",&n,&s)!=EOF){
if(n==0&&s==0)break;
int ans=0;
for(int a=1;a<n && 3*a<=s;a++){
for(int b=a+1; b<n && a+2*b<=s;b++){
int c=s-a-b;
if(c<=b)break;
if(n<c)continue;
ans++;
}
}
printf("%d\n",ans);
}
}
Nested Controls II - Spreadsheet
#include<stdio.h>
#include<vector>
int main(){
int r,c,n;
std::vector<int> colSum;
scanf("%d %d",&r,&c);
for(int i=0;i<c;i++)colSum.push_back(0);
while(r--){
int rowSum=0;
for(int j=0;j<c;j++){
scanf("%d",&n);
printf("%d ",n);
rowSum+=n;
colSum[j]+=n;
}
printf("%d\n",rowSum);
}
int rowSum=0;
for(int j=0;j<c;j++){
printf("%d ",colSum[j]);
rowSum+=colSum[j];
}
printf("%d\n",rowSum);
}
Character - Toggling Cases
#include<stdio.h>
#include<ctype.h>
int main(){
char c;
while(scanf("%c",&c)!=EOF){
if(islower(c)){
c=toupper(c);
}else if(isupper(c)){
c=tolower(c);
}
printf("%c",c);
}
}
