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AtCoder/abc391/B_Seek_Grid.cpp

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+#include <bits/stdc++.h>
+#define lo long long
+#define INF INT_MAX
+#define LLM LONG_LONG_MAX
+
+using namespace std;
+const int N = 1e7 + 10;
+/*
+    toothless. #17
+    @fredcss_dev
+*/
+
+signed main() {
+    int N, M;
+    cin >> N >> M;
+
+    vector<vector<char> > S(N, vector<char>(N));
+    vector<vector<char> > T(M, vector<char>(M));
+    for (int i = 0; i < N; ++i) {
+        for (int j = 0; j < N; ++j) {
+            cin >> S[i][j];
+        }
+    }
+    for (int i = 0; i < M; ++i) {
+        for (int j = 0; j < M; ++j) {
+            cin >> T[i][j];
+        }
+    }
+    for (int a = 0; a <= N - M; ++a) {
+        for (int b = 0; b <= N - M; ++b) {
+            bool match = true;
+            for (int i = 0; i < M; ++i) {
+                for (int j = 0; j < M; ++j) {
+                    if (S[a + i][b + j] != T[i][j]) {
+                        match = false;
+                        break;
+                    }
+                }
+                if (!match) break;
+            }
+            if (match) {
+                cout << a + 1 << " " << b + 1 << endl;
+            }
+        }
+    }
+
+    return 0;
+}