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#include<cstdio>
int main() {
     int x;
     scanf("%d", &x);
     int res = 0;
     for (int i = 0; i < x; ++i) {
       if (i * i % x == 1) {
         ++res;
}
  }
     printf("%d", res);
return 0;
}

prog.cpp:3:1: error: stray ‘\302’ in program
      int x;
 ^
prog.cpp:3:2: error: stray ‘\240’ in program
      int x;
  ^
prog.cpp:3:3: error: stray ‘\302’ in program
      int x;
   ^
prog.cpp:3:4: error: stray ‘\240’ in program
      int x;
    ^
prog.cpp:3:5: error: stray ‘\302’ in program
      int x;
     ^
prog.cpp:3:6: error: stray ‘\240’ in program
      int x;
      ^
prog.cpp:3:7: error: stray ‘\302’ in program
      int x;
       ^
prog.cpp:3:8: error: stray ‘\240’ in program
      int x;
        ^
prog.cpp:4:1: error: stray ‘\302’ in program
      scanf("%d", &x);
 ^
prog.cpp:4:2: error: stray ‘\240’ in program
      scanf("%d", &x);
  ^
prog.cpp:4:3: error: stray ‘\302’ in program
      scanf("%d", &x);
   ^
prog.cpp:4:4: error: stray ‘\240’ in program
      scanf("%d", &x);
    ^
prog.cpp:4:5: error: stray ‘\302’ in program
      scanf("%d", &x);
     ^
prog.cpp:4:6: error: stray ‘\240’ in program
      scanf("%d", &x);
      ^
prog.cpp:4:7: error: stray ‘\302’ in program
      scanf("%d", &x);
       ^
prog.cpp:4:8: error: stray ‘\240’ in program
      scanf("%d", &x);
        ^
prog.cpp:5:1: error: stray ‘\302’ in program
      int res = 0;
 ^
prog.cpp:5:2: error: stray ‘\240’ in program
      int res = 0;
  ^
prog.cpp:5:3: error: stray ‘\302’ in program
      int res = 0;
   ^
prog.cpp:5:4: error: stray ‘\240’ in program
      int res = 0;
    ^
prog.cpp:5:5: error: stray ‘\302’ in program
      int res = 0;
     ^
prog.cpp:5:6: error: stray ‘\240’ in program
      int res = 0;
      ^
prog.cpp:5:7: error: stray ‘\302’ in program
      int res = 0;
       ^
prog.cpp:5:8: error: stray ‘\240’ in program
      int res = 0;
        ^
prog.cpp:6:1: error: stray ‘\302’ in program
      for (int i = 0; i < x; ++i) {
 ^
prog.cpp:6:2: error: stray ‘\240’ in program
      for (int i = 0; i < x; ++i) {
  ^
prog.cpp:6:3: error: stray ‘\302’ in program
      for (int i = 0; i < x; ++i) {
   ^
prog.cpp:6:4: error: stray ‘\240’ in program
      for (int i = 0; i < x; ++i) {
    ^
prog.cpp:6:5: error: stray ‘\302’ in program
      for (int i = 0; i < x; ++i) {
     ^
prog.cpp:6:6: error: stray ‘\240’ in program
      for (int i = 0; i < x; ++i) {
      ^
prog.cpp:6:7: error: stray ‘\302’ in program
      for (int i = 0; i < x; ++i) {
       ^
prog.cpp:6:8: error: stray ‘\240’ in program
      for (int i = 0; i < x; ++i) {
        ^
prog.cpp:7:1: error: stray ‘\302’ in program
        if (i * i % x == 1) {
 ^
prog.cpp:7:2: error: stray ‘\240’ in program
        if (i * i % x == 1) {
  ^
prog.cpp:7:3: error: stray ‘\302’ in program
        if (i * i % x == 1) {
   ^
prog.cpp:7:4: error: stray ‘\240’ in program
        if (i * i % x == 1) {
    ^
prog.cpp:7:5: error: stray ‘\302’ in program
        if (i * i % x == 1) {
     ^
prog.cpp:7:6: error: stray ‘\240’ in program
        if (i * i % x == 1) {
      ^
prog.cpp:7:7: error: stray ‘\302’ in program
        if (i * i % x == 1) {
       ^
prog.cpp:7:8: error: stray ‘\240’ in program
        if (i * i % x == 1) {
        ^
prog.cpp:7:9: error: stray ‘\302’ in program
        if (i * i % x == 1) {
         ^
prog.cpp:7:10: error: stray ‘\240’ in program
        if (i * i % x == 1) {
          ^
prog.cpp:7:11: error: stray ‘\302’ in program
        if (i * i % x == 1) {
           ^
prog.cpp:7:12: error: stray ‘\240’ in program
        if (i * i % x == 1) {
            ^
prog.cpp:8:1: error: stray ‘\302’ in program
          ++res;
 ^
prog.cpp:8:2: error: stray ‘\240’ in program
          ++res;
  ^
prog.cpp:8:3: error: stray ‘\302’ in program
          ++res;
   ^
prog.cpp:8:4: error: stray ‘\240’ in program
          ++res;
    ^
prog.cpp:8:5: error: stray ‘\302’ in program
          ++res;
     ^
prog.cpp:8:6: error: stray ‘\240’ in program
          ++res;
      ^
prog.cpp:8:7: error: stray ‘\302’ in program
          ++res;
       ^
prog.cpp:8:8: error: stray ‘\240’ in program
          ++res;
        ^
prog.cpp:8:9: error: stray ‘\302’ in program
          ++res;
         ^
prog.cpp:8:10: error: stray ‘\240’ in program
          ++res;
          ^
prog.cpp:8:11: error: stray ‘\302’ in program
          ++res;
           ^
prog.cpp:8:12: error: stray ‘\240’ in program
          ++res;
            ^
prog.cpp:8:13: error: stray ‘\302’ in program
          ++res;
             ^
prog.cpp:8:14: error: stray ‘\240’ in program
          ++res;
              ^
prog.cpp:8:15: error: stray ‘\302’ in program
          ++res;
               ^
prog.cpp:8:16: error: stray ‘\240’ in program
          ++res;
                ^
prog.cpp:10:1: error: stray ‘\302’ in program
   }
 ^
prog.cpp:10:2: error: stray ‘\240’ in program
   }
  ^
prog.cpp:11:1: error: stray ‘\302’ in program
      printf("%d", res);
 ^
prog.cpp:11:2: error: stray ‘\240’ in program
      printf("%d", res);
  ^
prog.cpp:11:3: error: stray ‘\302’ in program
      printf("%d", res);
   ^
prog.cpp:11:4: error: stray ‘\240’ in program
      printf("%d", res);
    ^
prog.cpp:11:5: error: stray ‘\302’ in program
      printf("%d", res);
     ^
prog.cpp:11:6: error: stray ‘\240’ in program
      printf("%d", res);
      ^
prog.cpp:11:7: error: stray ‘\302’ in program
      printf("%d", res);
       ^
prog.cpp:11:8: error: stray ‘\240’ in program
      printf("%d", res);
        ^
prog.cpp: In function ‘int main()’:
prog.cpp:4:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
      scanf("%d", &x);
          ~~~~~^~~~~~~~~~

Standard output is empty