Submission #408593

#	Time	Username	Problem	Language	Result	Execution time	Memory
408593		LptN21	Igra (COCI17_igra)	C++14	100 / 100	1 ms	312 KiB

igra

#include <bits/stdc++.h>
using namespace std;
#define fastIO ios_base::sync_with_stdio(false), cin.tie(NULL), cout.tie(NULL);
#define FF first
#define SS second
#define pb push_back
#define sz(x) (int)x.size()
#define oo 1e9
#define eps 1e-9
#define PI acos(-1.0)
#define lb lower_bound
#define ub upper_bound
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> ii;
const int N = 5000+7, M=13+7;
const int MOD = 1e9+7;

int n, m, k, t;

char x[N], y[N];
int sl[3], slc[3];
int slt[3], slct[3];

void renew() {
    for(int i=0;i<3;i++)
        slt[i]=sl[i], slct[i]=slc[i];
}

bool check(int i, int j) {
    if(y[i]==j+'a') return 0;
    for(int i=0, lim=min(sl[0], slc[1]);i<=lim;i++) {
        renew();
        slt[0]-=i, slct[1]-=i;
        if(slt[2]<slct[1]||slt[0]>slct[2]) continue;
        if(slt[0]+slt[1]<slct[2]) continue;
        return 1;
    }
    return 0;
}

void solve(int idx) {
    if(idx==n) return;
    slc[y[idx]-'a']--;
    for(int j=0;j<3;j++) {
        sl[j]--;
        if(check(idx, j)) {
            printf("%c", j+'a');
            solve(idx+1);
            break;
        }
        sl[j]++;
    }
}

signed main() {
    //freopen("test.inp", "r", stdin);
    //freopen("test.out", "w", stdout);
    //fastIO;
    scanf("%d", &n);
    scanf("%s%s", &x, &y);
    for(int i=0;i<n;i++) sl[x[i]-'a']++, slc[y[i]-'a']++;
    solve(0);
    return 0;
}
/* stuff you should look for
    - int overflow, array bounds
    - special cases (n=1?)
    - do smth instead of do nothing and stay organized
    - WRITE STUFF DOWN
    - DONT JUST STICK ON ONE APPROACH
*/

Compilation message (stderr)

igra.cpp: In function 'int main()':
igra.cpp:61:13: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[5007]' [-Wformat=]
   61 |     scanf("%s%s", &x, &y);
      |            ~^     ~~
      |             |     |
      |             char* char (*)[5007]
igra.cpp:61:15: warning: format '%s' expects argument of type 'char*', but argument 3 has type 'char (*)[5007]' [-Wformat=]
   61 |     scanf("%s%s", &x, &y);
      |              ~^       ~~
      |               |       |
      |               char*   char (*)[5007]
igra.cpp:60:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
igra.cpp:61:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 |     scanf("%s%s", &x, &y);
      |     ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 100 / 100