Testing Round #16 (Unrated)

比赛链接：https://codeforces.com/contest/1351

A - A+B (Trial Problem)

#include <bits/stdc++.h>
using namespace std;

void solve() {
    int a, b; cin >> a >> b;
    cout << a + b << "\n";
}

int main() {
    int t; cin >> t;
    while (t--) solve();
}

B - Square?

#include <bits/stdc++.h>
using namespace std;

void solve() {
    int a1, b1, a2, b2; cin >> a1 >> b1 >> a2 >> b2;
    if (a1 > b1) swap(a1, b1);
    if (a2 > b2) swap(a2, b2);
    if (a1 + a2 == b1 and b1 == b2) cout << "YES" << "\n";
    else cout << "NO" << "\n";
}

int main() {
    int t; cin >> t;
    while (t--) solve();
}

C - Skier

#include <bits/stdc++.h>
using namespace std;

void solve() {
    string s; cin >> s;
    map<pair<pair<int, int>, pair<int, int>>, bool> mp;
    pair<int, int> pr{0, 0};
    int ans = 0;
    for (char c : s) {
        pair<int, int> pr0 = pr;
        if (c == 'N') pr.second++;
        else if (c == 'S') pr.second--;
        else if (c == 'W') pr.first--;
        else pr.first++;
        pair<pair<int, int>, pair<int, int>> p1 = make_pair(pr0, pr);
        pair<pair<int, int>, pair<int, int>> p2 = make_pair(pr, pr0);
        if (mp[p1] or mp[p2]) ++ans;
        else mp[p1] = mp[p2] = true, ans += 5;
    }
    cout << ans << "\n";
}

int main() {
    int t; cin >> t;
    while (t--) solve();
}

我这也算是在线 ak 过一场 cf 了吧 =。=