Compilare: main.cpp: In function 'int go(int)': main.cpp:3:125: warning: this 'for' clause does not guard... [-Wmisleading-indentation] int n, m, crt = 1, used[nm], mat[nm][nm], cp[nm], v[256], sol;int go(int nod){if (used[nod] == crt)return 0;used[nod] = crt;for (int i = 1; i <= m; ++i)if (mat[nod][i] && (!cp[i] || go(cp[i]))) {cp[i] = nod;return 1;}return 0;}main(){freopen("paznici.in", "r", stdin);freopen("paznici.out", "w", stdout);scanf("%d%d", &n, &m);for (int i = 1; i <= n; ++i)for (int j = 1; j <= m; ++j) {char ch;scanf(" %c ", &ch);mat[i][j] = ch - '0';}for (int i = 1; i <= n; ++i, ++crt)sol += go(i);for (int i = 1; i <= m; ++i)if (cp[i])v['A' + cp[i] - 1] = 1;int ok = 0;while (!ok) {ok = 1;for (int i = n; i > 0; --i)if (!v['A' + i - 1])for (int j = 1; j <= m; ++j)if (mat[i][j] && !v['a' + j - 1]) {v['A' + cp[j] - 1] = 0;v['a' + j - 1] = 1;ok = 0;}}for (int i = 0; i < 256; ++i)if (v[i])printf("%c", i);printf("\n");} ^~~ main.cpp:4:90: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' main.cpp: At global scope: main.cpp:4:105: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] main.cpp: In function 'int main()': main.cpp:6:126: warning: this 'if' clause does not guard... [-Wmisleading-indentation] main.cpp:7:31: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' main.cpp:8:124: warning: this 'if' clause does not guard... [-Wmisleading-indentation] main.cpp:9:21: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' main.cpp:5:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] main.cpp:5:48: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] main.cpp:5:70: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] main.cpp:6:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]