【CSP-J模拟赛十三】题解

比赛传送门

T1

a=input()
print(a[::-1],end="")
print(a)

T3

#include <bits/stdc++.h>
#define int long long
using namespace std;
int n;
string s;

signed main() {
    cin.tie()->sync_with_stdio(0);
    cin >> n >> s;
    int x = 10000000 / n;
    int sum = 0;
    for (int i = 0; i < n; i++) {
        int PM = x * (i + 1);
        int EXX = PM * 99 / 100, EX = PM * 98 / 100, AA = PM * 95 / 100, A = PM * 92 / 100;
        int B = PM * 89 / 100, C = PM * 86 / 100, D = 0;
        if (s[i] == 'P')
            sum += x + 1;
        if (s[i] == 'p')
            sum += x;
        if (s[i] == 'F')
            sum += x / 2;
        else
            sum += 0;
        if (sum >= PM)
            cout << "PM +" << sum - PM << endl;
        else if (sum >= EXX) {
            int a = PM - sum, b = sum - EXX;
            if (a < b)
                cout << "PM -" << a << endl;
            else
                cout << "EX+ +" << b << endl;
        } else if (sum >= EX) {
            int a = EXX - sum, b = sum - EX;
            if (a < b)
                cout << "EX -" << a << endl;
            else
                cout << "EX+ +" << b << endl;
        } else if (sum >= AA) {
            int a = EX - sum, b = sum - AA;
            if (a < b)
                cout << "EX -" << a << endl;
            else
                cout << "AA +" << b << endl;
        } else if (sum >= A) {
            int a = AA - sum, b = sum - A;
            if (a < b)
                cout << "AA -" << a << endl;
            else
                cout << "A +" << b << endl;
        } else if (sum >= B) {
            int a = A - sum, b = sum - B;
            if (a < b)
                cout << "A -" << a << endl;
            else
                cout << "B +" << b << endl;
        } else if (sum >= C) {
            int a = B - sum, b = sum - C;
            if (a < b)
                cout << "B -" << a << endl;
            else
                cout << "C +" << b << endl;
        } else if (sum >= D) {
            int a = C - sum, b = sum;
            if (a < b)
                cout << "C -" << a << endl;
            else
                cout << "D +" << b << endl;
        }
    }
    return 0;
}

T4

print(0)#30分WA