题单主要是鼠群群友书写的感觉还不错，就先拿这个练练手吧。链接：https://vjudge.net/article/8781
洛谷-P5734 文字处理软件
代码：
#include<bits/stdc++.h>
using namespace std;
int q, opt;
string str1;
int main(){
cin >> q >> str1;
while (q--)
{
int m, n;
string str2;
cin >> opt;
if (opt == 1){
cin >> str2;
str1 += str2;
cout << str1 << endl;
}
if (opt == 2){
cin >> m >> n;
str1 = str1.substr(m, n);
cout << str1 << endl;
}
if (opt == 3){
cin >> m >> str2;
str1.insert(m ,str2);
cout << str1 << endl;
}
if (opt == 4){
cin >> str2;
if (str1.find(str2) < str1.size()){
cout << str1.find(str2) << endl;
} else{
cout << -1 << endl;
}
}
}
return 0;
}
洛谷-P1603
#include<bits/stdc++.h>
using namespace std;
map<string, int> q;
string s;
int nums[10];
int cnt;
int main(){
q["one"]=1;q["two"]=2;q["three"]=3;q["four"]=4;q["five"]=5;q["six"]=6;q["seven"]=7;q["eight"]=8;q["nine"]=9;q["ten"]=10;
q["eleven"]=11;q["twelve"]=12;q["thirteen"]=13;q["fourteen"]=14;q["fifteen"]=15;q["sixteen"]=16;q["seventeen"]=17;q["eighteen"]=18;q["nineteen"]=19;q["twenty"]=20;
q["a"]=1;q["both"]=2;q["another"]=1;q["first"]=1;q["second"]=2;q["third"]=3;
for (int i = 0; i < 6; i++){
cin >> s;
if (q[s]){
int value = q[s] * q[s] % 100;
if (value == 0) continue;
nums[cnt++] = value;
}
}
sort(nums, nums + cnt);
cout << nums[0];
for (int i = 1; i < cnt; i++){
if (nums[i] < 10) cout << 0;
cout << nums[i];
}
return 0;
}
洛谷-P1308
#include<bits/stdc++.h>
using namespace std;
int ans;
string article;
string target;
int cur = -1;
string temp;
int main(){
cin >> target;
for (char& c : target) c = tolower(c);
getchar();
getline(cin, article);
article += ' ';
for (char& c : article) c = tolower(c);
for (int i = 0; i < article.size(); i ++){
if (article[i] != ' '){
temp += article[i];
}else{
if (temp == target){
ans ++;
if (cur == -1) cur = i - temp.size();
}
temp = "";
}
}
if (ans == 0){
cout << -1;
} else{
cout << ans << " " << cur;
}
return 0;
}