不知道有没有人遇到和我一样的问题
近日突然想起来洛谷部分题目存在判断失误问题（包括之前遇到过的一些题已经忘记题号），以下面两道题为例，贴出我的得分情况、输出情况和代码（已确认无空格和换行等差异）
P1067
我的代码
#include<stdio.h>
int main(){
int n,t;
scanf("%d",&n);
t=n;
while(n--){
int a;
scanf("%d",&a);
if(n!=0){
if(a>0&&(a!=1&&a!=-1)){
if(t==n+1)
printf("%dx^%d",a,n+1);
else
printf("+%dx^%d",a,n+1);
}else if(a==-1||a==1){
if(a>0&&t==n+1)
printf("x^%d",n+1);
else if(a>0&&t!=n+1)
printf("+x^%d",n+1);
else
printf("-x^%d",n+1);
}else if(a<0&&(a!=1&&a!=-1)){
printf("%dx^%d",a,n+1);
}else{
t--;
}
}
else{
if(a>0&&(a!=1&&a!=-1)){
if(t==n+1)
printf("%dx",a);
else
printf("+%dx",a);
}else if(a==-1||a==1){
if(a>0&&t==n+1)
printf("x");
else if(a>0&&t!=n+1)
printf("+x");
else
printf("-x");
}else if(a<0&&(a!=1&&a!=-1)){
printf("%dx",a);
}else{
t--;
}
}
}
int a;
scanf("%d",&a);
if(a>0&&t!=0)
printf("+");
printf("%d\n",a);
}
AC代码
#include <bits/stdc++.h>
using namespace std;
int main()
{
int n,a,i;
cin>>n;
for(i=n;i>=0;i--)
{
cin>>a;
if(a)
{
if(i!=n&&a>0) cout<<"+";
if(abs(a)>1||i==0) cout<<a;
if(a==-1&&i) cout<<"-";
if(i>1) cout<<"x^"<<i;
if(i==1) cout<<"x";
}
}
return 0;
}
P1098
这道题只下载了第7个测试点
输入
2 8 2
--09-8-w-er-7h-08w-e7-hc-r890-q7w-eh-rc98-07-q8-ewr-8h-c-8-294-5-dsf--k-h-2-48-3k-h-sd-fq-a-
输出
我的答案：--09-8-w-er-7h-08w-e7-hcQQQQQQQQPPPPPPPPOOOOOOOONNNNNNNNMMMMMMMMLLLLLLLLKKKKKKKKJJJJJJJJIIIIIIIIHHHHHHHHGGGGGGGGFFFFFFFFEEEEEEEEDDDDDDDDr890-q7w-ehQQQQQQQQPPPPPPPPOOOOOOOONNNNNNNNMMMMMMMMLLLLLLLLKKKKKKKKJJJJJJJJIIIIIIIIrc98-07-q8-ewr-8h-c-8-2945-dsf--k-h-23333333348-3k-hRRRRRRRRQQQQQQQQPPPPPPPPOOOOOOOONNNNNNNNMMMMMMMMLLLLLLLLKKKKKKKKJJJJJJJJIIIIIIIIsdEEEEEEEEfq-a-
AC代码的答案：--09-8-w-er-7h-08w-e7-hcQQQQQQQQPPPPPPPPOOOOOOOONNNNNNNNMMMMMMMMLLLLLLLLKKKKKKKKJJJJJJJJIIIIIIIIHHHHHHHHGGGGGGGGFFFFFFFFEEEEEEEEDDDDDDDDr890-q7w-ehQQQQQQQQPPPPPPPPOOOOOOOONNNNNNNNMMMMMMMMLLLLLLLLKKKKKKKKJJJJJJJJIIIIIIIIrc98-07-q8-ewr-8h-c-8-2945-dsf--k-h-23333333348-3k-hRRRRRRRRQQQQQQQQPPPPPPPPOOOOOOOONNNNNNNNMMMMMMMMLLLLLLLLKKKKKKKKJJJJJJJJIIIIIIIIsdEEEEEEEEfq-a-
我的代码
#include<iostream>
#include<cstring>
#include<cstdio>
using namespace std;
int main(){
int p1,p2,p3;
scanf("%d %d %d",&p1,&p2,&p3);
string n;
cin>>n;
for(int i=0;n[i];i++)
{
if(n[i]=='-'&&(-n[i-1]+n[i+1]<=25&&-n[i-1]+n[i+1]>0)){
if(p1==1){
int cha=n[i+1]-n[i-1]-1;
int start=n[i-1]+1-'a';
if(n[i-1]<='Z'&&n[i-1]>='A') start=n[i-1]+1-'A';
if(p3==1){
for(int pr='a'+start;pr-'a'-start<cha;pr++)
for(int pr2=0;pr2<p2;pr2++)
printf("%c",pr);
}else{
for(int pr='a'+start+cha-1;pr-'a'-start>=0;pr--)
for(int pr2=0;pr2<p2;pr2++)
printf("%c",pr);
}
}else if(p1==2){
int cha=n[i+1]-n[i-1]-1;
int start=n[i-1]+1-'A';
if(n[i-1]<='z'&&n[i-1]>='a') start=n[i-1]+1-'a';
if(p3==1){
for(int pr='A'+start;pr-'A'-start<cha;pr++)
for(int pr2=0;pr2<p2;pr2++)
printf("%c",pr);
}else{
for(int pr='A'+start+cha-1;pr-'A'-start>=0;pr--)
for(int pr2=0;pr2<p2;pr2++)
printf("%c",pr);
}
}else{
for(int pr=n[i-1]+1;pr<n[i+1];pr++) printf("*");
}
}else{
printf("%c",n[i]);
}
}
}
AC代码
#include<bits/stdc++.h>
using namespace std;
int p1,p2,p3,i=0,k;
char ch[300],be,af,f,j,p;//p用于输出;
int main() {
scanf("%d%d%d%s",&p1,&p2,&p3,ch);//输入;
while(ch[i]){//当ch[i]有值时;
be=ch[i-1];af=ch[i+1];f=ch[i];//f存储ch[i],便于判断;
if(f=='-'&&af>be&&(be>='0'&&af<='9'||be>='a'&&af<='z')){//意思是ch[i]若为'-',就判断其前后是否满足条件，满足进入循环;
for(p3==1?j=be+1:j=af-1; p3==1?j<af:j>be; p3==1?j++:j--){
p=j;//j是整形变量，p是字符型变量，这样是将p赋值为ASCII码为j的字符;
if(p1==2)//是否大写;
p=(p>='a')?p-32:p;//如果是字母就转成大写
else if(p1==3) p='*';//是否输出'*'
for(k=0; k<p2; k++)//输出p2个
printf("%c",p);
}
}
else
printf("%c",f);//如果ch[i]是非'-'或者其前后不满足条件，就原样输出;
i++;//一定要放在后面，不然会出错QAQ;
}
return 0;
}