50 lines
858 B
Java
50 lines
858 B
Java
package chelper;
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import io.InputReader;
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import io.OutputWriter;
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import misc.GCJSolution;
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public class TaskA extends GCJSolution {
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public void solve(int testNumber, InputReader in, OutputWriter out) {
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wrapSolve(testNumber, in, out);
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}
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@Override
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public void solve(int testNumber) {
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char[] s = in.nextString().toCharArray();
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int k = in.nextInt();
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int n = s.length;
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boolean[] a = new boolean[n];
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for (int i = 0; i < n; i++) {
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a[i] = s[i] == '+';
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}
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int ans = 0;
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for (int i = 0; i + k - 1 < n; i++) {
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if (!a[i]) {
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for (int j = 0; j < k; j++) {
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a[i + j] ^= true;
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}
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ans++;
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}
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}
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boolean ok = true;
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for (int i = 0; i < n; i++) {
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ok &= a[i];
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}
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if (ok) {
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out.println(ans);
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} else {
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out.println("IMPOSSIBLE");
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}
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}
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}
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