QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#499891#8509. Expanding STACKS!hhhhyfWA 0ms3788kbC++202.2kb2024-07-31 19:59:572024-07-31 19:59:59

Judging History

你现在查看的是最新测评结果

  • [2024-07-31 19:59:59]
  • 评测
  • 测评结果:WA
  • 用时:0ms
  • 内存:3788kb
  • [2024-07-31 19:59:57]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
#define all(a) a.begin(), a.end()
void print() { cout << '\n'; }
template <typename T, typename...Args>
void print(T t, Args...args) { cout << t << ' '; print(args...); }
using ll = long long;
const int N = 1e6 + 1, inf = 1e9;

int dir[4][2] = {
    {1, 0}, {0, 1}, {-1, 0}, {0, -1}
};

template <typename T> bool chmax(T &x, T y) { if (y > x) { x = y; return true; } return false; }
template <typename T> bool chmin(T &x, T y) { if (y < x) { x = y; return true; } return false; }

template <typename T = int>
vector<T> readVector(int n) {
    vector<T> a(n);
    for(T &x: a) cin >> x;
    return a;
} 

void solve () {
    int n;
    cin >> n;
    
    vector<array<int, 2>> a(2 * n);
    vector<int> pos(n);
    
    for (int i = 0; i < 2 * n; i ++) {
        char c;
        int x;
        cin >> c >> x;
        x --;
        if (c == '+') {
            a[i] = {0, x};
        } else {
            a[i] = {1, x};
            pos[x] = i;
        }
    }
    
    stack<int> stk[2];
    vector<int> ans(n);
    for (auto& [t, i]: a) {
        if (t == 0) {
            if (stk[0].size() && pos[i] < pos[stk[0].top()]) {
                stk[0].push(i);
            } else if (stk[1].size() && pos[i] < pos[stk[1].top()]) {
                stk[1].push(i);
            } else if (stk[0].empty()) {
                stk[0].push(i);
            } else if (stk[1].empty()) {
                stk[1].push(i);
            } else {
                cout << '*';
                return;
            }
        } else {
            if (stk[0].size() && stk[0].top() == i) {
                ans[stk[0].top()] = 0;
                stk[0].pop();
            } else if (stk[1].size() && stk[1].top() == i) {
                ans[stk[1].top()] = 1;
                stk[1].pop();
            } else {
                cout << '*';
                return;
            }
        }
    }
    for (int x: ans) {
        cout << (x == 0 ? 'G' : 'S');
    }
}

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	
	int t = 1; 
	//cin >> t;
	while(t --) {
	    solve();
	}

	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3744kb

input:

2
+2 +1 -1 -2

output:

GG

result:

ok correct

Test #2:

score: 0
Accepted
time: 0ms
memory: 3596kb

input:

2
+1 +2 -1 -2

output:

GS

result:

ok correct

Test #3:

score: 0
Accepted
time: 0ms
memory: 3528kb

input:

3
+1 +2 +3 -1 -2 -3

output:

*

result:

ok correct

Test #4:

score: 0
Accepted
time: 0ms
memory: 3584kb

input:

10
+3 -3 +4 -4 +6 +2 -2 -6 +7 -7 +5 -5 +10 +1 +9 +8 -8 -9 -1 -10

output:

GGGGGGGGGG

result:

ok correct

Test #5:

score: 0
Accepted
time: 0ms
memory: 3616kb

input:

10
+8 -8 +2 +10 -2 -10 +7 -7 +1 -1 +6 -6 +5 +3 +4 +9 -9 -4 -3 -5

output:

GGGGGGGGGS

result:

ok correct

Test #6:

score: 0
Accepted
time: 0ms
memory: 3548kb

input:

42
+26 -26 +12 +8 -12 -8 +30 +5 +22 +3 -3 +2 -30 +10 -10 -2 -22 +23 +39 -39 +17 -17 -23 +38 +24 -24 +27 +29 -29 -27 -38 -5 +37 -37 +21 +16 +28 -28 +6 +40 +14 +19 -19 -14 +11 +35 -35 -11 +4 +25 -25 -4 -40 -6 +13 +20 +1 -1 +33 +34 +7 -7 -34 +41 -41 +36 +31 -31 -36 +42 +32 -32 +15 +18 -18 -15 +9 -9 -42...

output:

GSGGSGGSGSGGGGGGSGGGGSSSGGSGSGGGGGGGGSSGGG

result:

ok correct

Test #7:

score: 0
Accepted
time: 0ms
memory: 3524kb

input:

42
+40 +18 +42 +2 +1 +21 +33 -2 +8 -33 -8 +14 -40 +34 +30 +31 -31 -30 +5 -5 +4 -34 +13 +3 -13 -3 -4 +28 -28 +17 -17 +35 +10 -10 +16 +39 +36 +37 -37 -36 -39 +25 +6 +41 -41 +20 +12 +32 -32 -25 -12 -16 -35 +38 -20 -38 -14 +15 -15 +9 +26 +23 -21 -1 +7 -23 +22 +24 -7 -24 -42 -18 -22 -26 -9 -6 +27 +29 -29...

output:

SGSGSGSGGSGGGSGSSSGGSGGGSGGSGSSGSSSSSSSGGS

result:

ok correct

Test #8:

score: 0
Accepted
time: 0ms
memory: 3612kb

input:

42
+29 +6 +7 +2 -7 -2 +23 -23 -6 -29 +19 -19 +16 +8 -16 -8 +32 -32 +3 +37 +17 -17 -37 -3 +22 -22 +18 +1 +40 +36 -1 -36 -40 -18 +9 -9 +30 +25 -25 +14 +39 +5 +20 -5 +12 -39 +28 +10 -14 +24 -24 +35 +15 -15 +41 -30 +33 -33 -41 -35 -10 -28 -12 +21 +38 -38 -21 +11 +13 -13 +4 +42 +27 +34 -34 +31 -31 +26 -2...

output:

GSGSGGGSGSSSSGGGGGGSSGGGGSSSGGSGSSSSGSGSSS

result:

ok correct

Test #9:

score: 0
Accepted
time: 0ms
memory: 3536kb

input:

100
+39 -39 +4 +71 -71 +53 -53 +46 -46 -4 +91 -91 +97 -97 +6 -6 +54 -54 +76 +35 -35 +50 +89 -89 +98 -50 -76 -98 +34 +55 +95 -34 +36 -36 +73 -95 -55 +18 +47 +20 +30 +33 -30 -33 +80 -73 +51 -51 -80 -20 +69 +77 -69 +85 +62 +84 -84 -77 +48 +49 -49 +1 -1 -48 +19 -19 -62 -85 +41 +16 -16 -41 +63 +2 -2 +65 ...

output:

SSGGGGSSGSGSGSGSGSSSGSGSGSGGGGGSSGGSSGGGSGGGGGSSSGSGGGSSSGGGGSSGSSGGSGGGGGSGGGSSGGSGSGGGGGGGGGSGGSSG

result:

ok correct

Test #10:

score: 0
Accepted
time: 0ms
memory: 3788kb

input:

100
+5 -5 +61 +48 +60 +69 +7 -7 -69 -60 +45 -45 -48 -61 +68 +4 +82 +57 -57 +12 -12 +22 +46 -46 -22 +14 +30 -30 +47 -47 -14 +94 -94 -82 +44 +27 -27 -44 +86 -86 -4 +50 +15 -15 -50 -68 +58 -58 +28 +83 -83 -28 +53 +1 +56 -56 +67 +13 +73 +87 +19 +65 +18 -18 +17 -17 +89 +62 -62 -89 +72 -72 +25 -25 -65 +98...

output:

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

result:

ok correct

Test #11:

score: 0
Accepted
time: 0ms
memory: 3592kb

input:

100
+96 +64 -64 +41 +11 +62 +18 +25 +3 +26 -26 -3 +22 +61 +59 +73 -59 -73 -61 -62 +20 -41 -20 +46 -46 -22 +2 +10 -10 -2 -25 -18 +9 -9 -11 +60 +33 +97 +38 -38 +5 -5 -97 +81 +29 -29 -81 +92 +1 +52 -52 +87 +19 -19 +90 -90 -87 -1 -92 -33 -60 -96 +47 +6 +72 -72 +79 +98 +45 -45 +23 -23 -98 +35 -35 +27 -27...

output:

GGGGGGGGGGSGGGGGGSGSGSGGSGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGSGGGGGGGGGGGGGGGGGGGGGGGGGGG

result:

ok correct

Test #12:

score: -100
Wrong Answer
time: 0ms
memory: 3528kb

input:

171
+118 +125 +156 +76 +123 +61 +107 +15 +160 -15 -107 -160 +98 +127 -127 +152 -61 -123 +48 +139 +86 -86 +43 +129 +164 +167 +6 +9 +137 +20 +16 -20 -16 +11 +12 +133 +24 -24 -137 -133 +81 +71 +88 +142 -142 +105 -88 +93 +33 -33 -105 +85 +64 -64 +150 +5 -150 +121 -85 +1 -121 +41 -5 +53 +67 +3 -3 +72 +10...

output:

*

result:

wrong answer team and jury output doesn't agree on whether there's an assignment